INSANE A LEVEL MATHS EXAM HACK (FACTORISING HACK!) - For 2018 Exams
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- Опубликовано: 2 ноя 2016
- (GOOD VIDEO)INSANE A LEVEL MATHS EXAM HACK (FACTORISING HACK!)
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HOW TO FACTORISE A CUBIC, OR A QUADRATIC OR ANYTHING USING A CALCULATOR! AN INSANE TIP FOR GCSE MATHS. INSANE TIP FOR ALEVEL MATHS.MAINLY ALEVEL MATHS! ALL ALEVEL MATHS STUDENTS MUST WATCH. HOW TO PROPERLY USE A CALCULATOR IN A LEVEL MATHS.PROPERLY USE A CALCULATOR. LEAVE A LIKE AND SUBSCRIBE. DID YOUR TEACHERS SHOW YOU THIS?!
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We answer this stuff all the time in yr 10 maths. Thanks for the trick. Your a lifesaver
In year 10 you do quadratics not cubics
The silver Casio calculators (fx-991ES PLUS) have an even easier cheat:
MODE > "5: EQN" > "4: ax^3 + bx^2 + cx + d = 0"
Then you get a table with 1 row and a column for a, b, c and d (i.e. the coefficients of each power of x), so in this example, a = 1 (1x^3), b = 1 (1x^2), c = -16 (-16x) and d = -16.
Hit "=" and you get "X1 = 4"
Hit it again and you get "X2 = -1"
Once more, "X3 = -4"
That gives you your 3 solutions.
There's an option for quadratics equal to zero and for problems in "ax + by = c" and "ax + by + cz = d" form too. Really useful, and perfectly permissible in an exam!
cheers Talek!
The casio 991ex classwiz is even more advanced than the silver casio
I don't even do maths a level and I'm watching this
Nasir jeez your a true supporter!!
Student Vlogs - Dylan always watch your videos, top quality content
Nasir lol same
same. I do use of maths
You are saving yourself from a lot of pain by not doing A Level Maths. Its fantastic.
This has just come down to the new GCSE
ahhhhh
Steve DL i started college this week. Doing A level maths..how hard is it? Ive had 1 lesson so far but wat we did was fairly simple and nothing new but im sure after it will be hard af
I regard A Level Maths as `proper Maths.` For me it was challenging, but so immensely fascinating. I can`t answer your question, to be honest, because to me it is as fascinating as it is challenging and I always get the two mixed up - if that makes sense.
I didn`t do A Level Maths because I had to, but because I love it -which I think helped a lot.
No doubt there will always be those whom are going to find this A Level easy. You might be one of them. Enjoy it.
Steve DL ok thanks...i see u commenting alot..u must really love maths..i do too im not the best at it but im okay..hopefully i do well on it..thing is im doing a new spec so there wont be past papers but i dnt think it will be too different than last year..all my teacher said is we r gna do mechanics and statistics not decision ( i have no idea wat any of those r lol just started) doing aqa btw u can check the specification to see the differences. 👍
Cubic? Exams this year only go to Quadratic, but we have to factories without a calculator!
lmao throwback to those iconic calculators! I don't do a level maths but watching this is giving me horrible flashbacks to gcse maths lol
hannahsgeneration haha maths is just so long!
Oh, go on. Try A Level Maths. Its ridiculous.
2016 - "unless you do A level maths you probably want to turn this video off"
me (year 10) oh right its factorising...dont have a clue what that is
2019 -
me (year 10) factorising is the norm mate wot
boiiii i've known this since existed year 7 😂
liked anyway though my g
Surina M shots fired 💔 but cheers !
Remind me not to mess with you.
If you want to factorise cubics take X outside multiplied by a bracket and factorise that quadratic
IVBPLAYS can't always take x out as factor. But yeh if you could that's how you'd do it
Or you don't cheap out on the calculator and you get the next one up. You can then press mode and there is a factorise function that allows you to type in the equation and you don't do any work.
true!!!
Watch my latest video where I show you the best calculator to get for Alevel
Unfortunately, we weren't allowed to use those kind of calculators during any exams
Aaman kudhail it’s the Casio classwiz trust me
Thanks for the tip! Is there a particular module in A2 that involves this? e.g. C3 or C4
Thank you so much😩🥺😊you’re the best 👏🏾
Bless my man
you just got a subscriber
This is just a personal tip of mine. Obvs its flawed to a certain extent because it's the way I personally do it. But it is helpful in alot of circumstances!! If you enjoyed dont forget to subscribe and chekc out this inasane websote! www.StudentEar.com
Student Vlogs - Dylan 😂, there is a grey casio (85 something I think) that you literally get a list of equations, find the one you have, put values in and it solves
IVBPLAYS that's sickkkkkk
Student Vlogs - Dylan, agreed, get the best calculator allowed, and use that to solve those equations. But you still have to do it properly without the calculator, they will not give you many marks if you just write the answer in, you have to show the workings otherwise they know you just used your calculator.
So learn the proper solution, and use this tip to check you got it right
Or if you run out of time, then give it a go with the calculator and hope you get lucky
Ok can u please tell me how u got all the uni offers even when they were way higher than ur predicted? Was it the epq, extra curricular or what?
If only I’d known this hack before gcse Further maths
Im your 4,265th subscriber ngl you're are a very entertaining vlogger👍
btw i just started AS and this method is sik
Shoaib Mohammed thank you!! good luck!!
I just started AS but idc I'm gunna use this daily
Amelia Ward haha good!!
Amelia Ward C12 is shittt😩😩
Ohh thanks !Uhm.. .Can i ask how do you turn your calculator back to the mode before this on ?
such a good idea, thanks
welcomee!
Wow now i am able to solve polynomial of every degree by using the same method
Well Done on your offers! what are you thinking to put down as your firm and insurance!? love your videos btw :)
thank you!! Keele and York then might apply for clearing at Loughborough
Can you do it when the quadratic/cubic or anything has a coefficient?
Thank you
The part where you have to insert a value for start, end and steps (basically the number of values you want to include in your table), the for start and end, the maximum you can go up to is between -14 and 14. Any range larger the calculator will say "insufficent space". Hence technically you can explore other roots of equations at a larger range than between -5 and 5.
And if the roots don't have an x-value in range -5, 5?
make the numbers the range i think
our math teacher told us this
Good trick with nice easy way to use factor theorem! Will help me in maths and further maths. Cheers👌 but not in c1😂
sangon chokas yeh welcome bro! just use it to double check stuff!
smart right there
Hey bro I used to use this but it doesn't always work. If you have something like 2x^2 + 4x + 2, and you factorise u get the same answer as factorising x^2 + 2x + 1, but thats clearly wrong. You have to take out a factor (in this case 2), and then you factorise. Please put this in your video.
i will thanks bro!!
That isn't wrong though is it? It's just a multiple, or is it because you cannot divide 0 by 2, that it's wrong?
Can we use the EQN mode in the Casio fx-991 es plus?
yeh i think so
thanks bro
THANK U
If you guys a fx-991ES PLUS then you have to press mode and then press 7. I hope tis was helpful!
what are you going to study at uni? I've accepted my offer from York for physics.
James Wyatt probs economics and nice bro!!
I'm doing further maths at gcse can this be used in also doing a level maths and physics
This'll be useful for C4 on Friday 😏 thank u ✨
Are you ok
Any ideas on how to solve this question,
In triangle ABC, AC= 18cm, angle ABC= 60 degrees and sinA= 1/3
Use the sine rule to show that BC= 4 root 3
Taylor Shill I know this reply is a month late but here is how you do it:
(I’m assuming you know the sine rule.)
If you rearrange the equation to make BC the subject, you would get:
BC=(AC x sinA)/sinB
Since AC= 18cm, sinA= 1/3, and angle B is 60, you can deduce that:
BC= (18 x 1/3)/sin60
= 4 root 3
Hope you understand it. :)
Jucoflyer thanks 😁😁
This is called the factor theorem haha
looool
Omg thanks for sharing this
Priyanka Assi welcome!!!
hey how do I do middle factor equation in fx-991EX
no clue sorry
wouldn't it be easier to get a graphical calculator cause it does all the statistical factors like finding the regression line in 5 seconds but also makes graphs and does polynomial and simultaneous equations. It is also allowed in the exam board
where's this been my whole school life???
That's really clever. I mean, you could just get a silver calculator which has this as a feature, but if you don't that's genius.
How do you reset the calculator
It's basically just the remainder theorem, using your calculator to evaluate f(x) for 10 different x values and hoping that one of them makes f(x) = 0...
Thank you thank you thank you
Thanks BRO... 🤩🤩🤩🤩
anytime g
That was actually a decent tip!
Don Joseph welcome bro!
I just need to pass maths lol
hmm how would you know what it factorised to if one of the factors had a 2x in say like (2x+3)
RobbieAwolf It wouldn't as the highest degree that a term was raised to was 3 therefore each bracket could only have 1 x value.
On this example yes but if one of the factors had a coefficient greater that one this wouldn't work
RobbieAwolf On the table the values of x would be non integers
every knew that love XD
I’m so confused
Just use Factor Theorem?
Nice London underground bedspread 😄😄
Factorisng equaions wouldnt usually come up on a calc paper
tru
Or you could just learn the factor theorem like you're meant to in c1. Also there you're hoping you've got a root between -5 and 5. Especially in harder questions you're not going to be getting nice root, or if you do further you'll almost certainly be getting some complex roots.
MrP4RR0TT yeh true say, it's more of a checking method I guess!
What about squares not cubes?
What uni are you going to choose?
york or keele bro
thanks m8
Kimon Statheros welcone
im doing my gcses and im not being funny i could solve that without a calculator but it is still cool, well dine on your uni stuff aswell bro
Which course are u thinking of going to?
economics and finance bro
Dude u got caught trying to add RICEGUM and MEWTO as tags in the description LOL what.
put the tags in the tag dialog box, and dont make yourself look bad like dis man.
BTW: Thanks for the help.
What if there's something like 2X^2 etc? Thanks in advance.
Just use the factor thearom. I mean at this stage why tf do u need a calculator to factories simple polynomials.
I'm doing Core maths in year 12 which is apparently worth an AS
any tips on core?
use exam solutions
London Underground bedspread madness
I don't understand why you would do this. Either use a proper method (probably the best way) or, if you aren't very good at maths, buy a graphical calculator to locate roots.Also, that particular casio calculator won't find factors outside a certain domain.
plz make a vid on how to revise ...that would help cuz gcses are comin and I don't have a clue
Harold jacob aight bro will do a video for that soon!
I'm new to a level maths this year. Any tips for freshman
Storm Trooper #33 exam solutions my friend
If you click on my channel then not only do I explain how I got an A* but also I how I originally got a B in my first year and got an A* in my second!. More videos on A/A* in both chemistry and economics coming real soon.
If you get the fx-991ES you can just solve the equation and it gives the roots
Just done my maths resist and it had a question like this but I left it out 😵 wish I watched this before 😔
katie kennedy yeh bro same happened to me in the real thing :((
I didn't understand after the "END?" thing am really confused 🤔🤔🤔🥴
The calculator function writes a table for f(x), end is where the range for x values in the table stop.
what maths do you do?
im doing stats as :)
ReiZ Bltz I did stats at AS now doing D1 at A2
START = The lowest value of f(x)
END = Highest value of f(x)
STEP = Numeric Interval between f(X) values
So, START = 3, END = 6, STEP = 0.5, will give you f(x) values: 3, 3.5, 4, 4.5, 5, 5.5, 6.
Thank you!
Esha Ahmed y
tyyyy
welcome bro
Not good advice at all, what if it factorises to something like (x-7) etc, the domain doesn't account for that. And the calculator has limited storage so you can't have the domain be two extremes.
Ayy 5 offers? Damn well done. Sent my UCAS off for economics, now we wait😭. How long did it take for you to hear back?
CuteBhavii ranges from the next day to weeks to months.
CuteBhavii thanks bro and overall about 3 weeks
would you be able to do this in exams, would you still get full marks??
Rejwana Ahmed yeh you would be able to except if it actually asks you to use the factor theorem
It's a good way to check your answer
2 YEARS AGO BTW
I have my Mock Exam in January. Will so be using this XD.
jodiestardust If it's C1 then you're out of luck xD. This is for C2 and C4 I believe as you can use a calculator in those modules.
Champion171299 :D and C3
Jono Shaw Isn't C3 non-calculator?
Champion171299 :D nope it's 100% calculator, I'm doing it this year
Jono Shaw Wow, I thought it was non-calculator. Guess I was wrong. I thought it was going to be non-calculator like and C1 and then then C4 be calculator, well then - you learn something new everyday I guess.
I think it's important to note that this method will not work immediately for functions which have coefficients of x³ or x². It will still give you the roots, but you will not get the correct set of brackets if you go from those values.
Instead, if the coefficient of x² for example, is 2, then there's going to be a bracket that involves 2x. In This case, use 0.5 as your step. If the coefficient is 3, use ⅓ as the step, you get the idea. Then if you get an answer like X = ½, the bracket will be (2x-1).
Or, just buy the better fx-991ES calculator. It'll save you a lot of time and it has some very useful statistics functions too.
If money is no object, go for a graphical calculator such as the fx-9750GII. I can't express how useful the graphical calculator is for A-level maths, especially when you get to A2 and start dealing with modulus graphs. Both of the aforementioned calculators are allowed by JCQ (Joint Council for Qualifications) and so are allowed in to any A-level maths exam where a calculator is permitted.
Anyway, I hope this helps someone, and good luck in May/June!
yeh trueeeee
Do more gcses tips..This shit toooo complicated!!!
Roman I aight bro will do!!
Calculators nowadays will give u all the solutions max/min points very easily. U just have to type in the equation. That's it.
Hellooooo honeyyyyy , my exam is in 2 days
good luck
Pretty sad if you can't factorise a quadratic/cubic without the use of a calculator
This only works if the solutions for x are integers. You might get a question where the solutions are fractions :(
Ohh thanks
Factor theorem
Or get the classwiz 991ex which is SUITABLE for the NEW A-level exams and not the one shown in the video which is only suitable for GCSE and below
lve known dis way from year 6
I do a level maths I've either not got to this point yet or i fell asleep in class. (Which isn't uncommon)
Oh no I have done this
Jasmin Applepie 😂😂😂😂
or u can just use syntheitic rule...
What is this im one year before senior year and i didn't study this im studying limit and derivation and primitive and delta and these shits and fking cos formulas like cos a+b=cos a cos b-sin a sinb lol
ohh i seee
hey what calculator would you recommend for a level maths
Tayo Wilson standard whs Smith one bro
Tayo Wilson casio fx991-es plus or the next one up
Or you can just use Factor Theorem so you get method marks.....
btw no more a2 only as and a level
Thats true bro
Shame you can't use a calculator in the non-calculator paper.
Its not a hack boy it's called a function okk
Why is quality max 440
360 even
Phantom chaos it's still rendering bro
1080P for me
This just utilises the factor and remainder theorem. It check values from -5 to 5 and shows the remainder when they are input into the function instead of x. When rem is zero the value is a root of the function which means (x and the inverse value) is a factor that divides it perfectly. Know the maths not tricks ffs
factorising
leah :0 my bad!!
Lol we're doing this at ks3