Adding and subtracting rational expressions | Algebra II | Khan Academy

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  • Опубликовано: 19 ноя 2024

Комментарии • 142

  • @roarrrist
    @roarrrist 7 лет назад +238

    I just wanna cry

    • @krishnapriyapalanki3868
      @krishnapriyapalanki3868 3 года назад +5

      i am already crying! :(((

    • @AhmedHossam-hs6mb
      @AhmedHossam-hs6mb 3 года назад +1

      Me toooooo😭😭😭😭😭

    • @itsmevsme7308
      @itsmevsme7308 2 года назад +9

      Lol. Some days I look at this kind of stuff; get confused and ask myself if life is worth living as a moron. But then I remember the days I come in and it all makes sense. I might not always be at my peak proformance but I live for the days where I can use my abilities to help others. But why waste them on math that I don't plan to use. I think it has more to do with weather or not you are in the mood to do it. Everyone can but not everyone wants to. This is just my experience but it's not uncommon. I hope this helps you understand why you're having trouble with math.

  • @dostream1
    @dostream1 10 лет назад +221

    why can i understand everything you just did but i have no clue whats going on in class

    • @humberto5037
      @humberto5037 9 лет назад +7

      omg that's so me

    • @scrumptiousdumpalings5322
      @scrumptiousdumpalings5322 7 лет назад +2

      dori xhani I am just in fifth grade so I don't have to know this but I feel like he pulls stuff out of nowhere

    • @LilLeanCuisine
      @LilLeanCuisine 7 лет назад +24

      Banana Legend GamingXL That's because you're in the 5th grade

    • @rm.makes.me.smile_
      @rm.makes.me.smile_ 7 лет назад +5

      Banana Legend GamingXL at least you're starting early, in another five years you'll be thanking the lort of RUclips that you watched this video

    • @emilyczaja2291
      @emilyczaja2291 7 лет назад +2

      dori xhani ikr

  • @squrrelgirl
    @squrrelgirl 9 лет назад +82

    It is so nice in this day and age to have internet. When I graduated high school in 1994, we didn't get the luxury of being able to get math help like this. Now that I'm back in college, this has helped me so much. Thank you Khan Academy!

    • @virtueisdead
      @virtueisdead 4 года назад

      I was about to ask "positivity is positivity, but how did you get to this video?" and then I read the last bit.

  • @KaliseBOSSIN12
    @KaliseBOSSIN12 10 лет назад +48

    thank the lord for you , my teacher cant teach and makes stuff so complicated.

  • @mrjesseanthony
    @mrjesseanthony 6 лет назад +12

    I just want to say thank you so much for these videos. You are a great teacher and I am sure it is because you enjoy being an educator. I sit in class struggling, paying as close attention as possible and don't get it in three hours, but I watch your 8 minute video and understand perfectly. Thank You!

  • @reyneezyfosheezym5650
    @reyneezyfosheezym5650 11 лет назад +10

    You are seriously the greatest math teacher on this planet. From the bottom of my heart, THANK YOU SMART MAN!

  • @fragban5994
    @fragban5994 6 лет назад +111

    Well... Looks like I'm failing my test tomorrow

  • @MrME11999
    @MrME11999 10 лет назад +15

    You are better than my teacher, he makes complicated things.

  • @alpha-pc5vj
    @alpha-pc5vj 10 лет назад +15

    HELPED ME ALOT

  • @ναι-τ3γ
    @ναι-τ3γ 5 лет назад +11

    Any struggling failure freshmen like me around? Everyone in my class is literally so smart and I'm here failing everything👏🏼

  • @simplyforfun5875
    @simplyforfun5875 3 года назад +2

    Khan academy is the best math channel, thanks so much for the help; we all appreciate it!

  • @pokimonmane9667
    @pokimonmane9667 3 года назад +1

    You are a savior in these confusing online classes

  • @brilliantaksan
    @brilliantaksan 6 лет назад

    I LOVE YOU KHAN ACADEMY previously before watching your videos I would get grades below my intentions but now after seeing your videos I now reach above my intentions

  • @charlesrlassiter
    @charlesrlassiter 11 лет назад +2

    EXCELLENT-- Learned a great deal. Thank you for going in detail step-by-step. Super presentation. THANK YOU FOR SHARING YOUR EXPERTISE!!!!

  • @paoloansis4429
    @paoloansis4429 7 лет назад +1

    THANK YOU SO MUCH FOR MAKING THIS VIDEO NOW I CAN PASS MY QUIZ

  • @Shreya-jo6cp
    @Shreya-jo6cp Год назад

    Sir your way of teaching is very hard-core

  • @rachelzachary1
    @rachelzachary1 12 лет назад +2

    Ah i am still confused but you explain algebra 2 better than my teacher!! Thanks :)

  • @ssammarra
    @ssammarra 11 лет назад +1

    you are literally the reason why I'm going to ace my exams. thank you thank you thank you

  • @josseeeagustas1201
    @josseeeagustas1201 10 лет назад +2

    Thanks, its very helpful

  • @KoolKarl123
    @KoolKarl123 10 лет назад +60

    Wtfff i still don get this omg T^T

    • @rm.makes.me.smile_
      @rm.makes.me.smile_ 7 лет назад +27

      Atlas I know I'm 2 years late but did you ever pass that Algebra 2 class? 😂

    • @hadi6656
      @hadi6656 7 лет назад +1

      aylmao

  • @samyapatel9426
    @samyapatel9426 3 года назад +1

    he is best techer , who agree like and leave a comment

  • @joanameza9310
    @joanameza9310 6 лет назад

    thanks sooooo much.....u finally made me understand

  • @davidmarcelino8015
    @davidmarcelino8015 8 лет назад +3

    i'm dying, your so fast!

  • @AbdulRehman-sl7fu
    @AbdulRehman-sl7fu 3 года назад

    Thank you sooooooo much Salman Sir!

  • @ZHEER
    @ZHEER 11 лет назад

    OMG thank you thank you!!!
    i was dying to learn this, i have an exam and i didn't know what to do, you saved my ass bro, god bless you and RUclips.

  • @Turkell275
    @Turkell275 11 лет назад

    Thnx khanacademy, realy helped

  • @artic_foxking2897
    @artic_foxking2897 5 лет назад

    It really helped me a lot thx

  • @Lemon-vb5zo
    @Lemon-vb5zo 4 года назад +2

    what a great video!

  • @jcjosol_
    @jcjosol_ 12 лет назад

    thank you! this really helped me a lot on my assignment!

  • @brendanp9415
    @brendanp9415 7 лет назад

    What would we do without Sal Khan...thank you for another quiz grade saver

  • @TorricRoma
    @TorricRoma 11 лет назад

    I love you man youve helped me!

  • @shanemumma9123
    @shanemumma9123 6 лет назад

    Great explanation, thank you!

  • @barzkurd2060
    @barzkurd2060 8 лет назад

    that was helpful

  • @kyle556owns
    @kyle556owns 11 лет назад

    Thanks a bunch!!!

  • @sumenadahal
    @sumenadahal 11 лет назад

    Thanks so much

  • @Senri0812
    @Senri0812 6 лет назад +1

    Its this easy wow

  • @alyssapowell9933
    @alyssapowell9933 3 года назад +1

    Khan Academy: You can learn anything!
    Me: No comprendo.

  • @stammel6332
    @stammel6332 7 лет назад

    Yes

  • @rambo0718
    @rambo0718 8 лет назад +4

    2016 !! 😂 but still helped me alot

  • @lostherotwelve9798
    @lostherotwelve9798 7 лет назад

    Could: 2/2x-10 = 1/x-5

  • @riyricaat
    @riyricaat 5 лет назад +1

    The second fraction isn't supposed to be multiplied by x+5only?instead of 2(x+5)

  • @LavaCube48
    @LavaCube48 4 года назад +1

    Well I guess in advanced I know i wont be getting my study guide done that’s due today.

  • @wiltedrose9666
    @wiltedrose9666 4 года назад +8

    Looks like I’m failing my entire semester during this bs pandemic

  • @puolisointu
    @puolisointu 13 лет назад

    nice

  • @lucymacdonell217
    @lucymacdonell217 6 лет назад

    My brain hurts, but understanding feels good...

  • @scheewheed8285
    @scheewheed8285 6 лет назад +2

    I'm still not sure if I get it or not

  • @virtueisdead
    @virtueisdead 4 года назад +2

    Anybody else having a panic attack watching this at 4:45am?

  • @hichkl
    @hichkl 10 лет назад

    omg may gzus bless ur soul

  • @sabelocarzonpangilinan3294
    @sabelocarzonpangilinan3294 5 лет назад +1

    For what grade is this for?
    Im in grade 8 and i feel like my school is a bit advanced...

  • @전전경아-i7h
    @전전경아-i7h 8 лет назад

    what do you do when 3/2b+2/5c

    • @thatchewy
      @thatchewy 8 лет назад

      the common denominator is 2b(5c), multiply the numerators 3 by 5c, and 2 by 2b

  • @olgaslavkov3444
    @olgaslavkov3444 9 лет назад +13

    An 8 minute MATH problem,, wtf America

  • @Reekmarble
    @Reekmarble 3 года назад +1

    Bruh instead of just saying factor it out show the whole damn process like this is so stressful when people don't from step 1 to step 2 completely justify your answer as you go I am sooo annoyed by this

  • @koolkush7982
    @koolkush7982 Год назад

    Am I the only 12 year old learning this??? Also thank you for these videos it helped me a lot!

  • @FALLOUTVEAGASBOY12
    @FALLOUTVEAGASBOY12 8 лет назад

    X over x squared -9 +3 over x (x-3) helpppppp

  • @GetUpAndWatchVideos
    @GetUpAndWatchVideos 8 лет назад +5

    I'm still REALLY confused about writing out the domain part. ????????

    • @trvpgame7710
      @trvpgame7710 8 лет назад +6

      It's basically what can go into x to make the denominator = 0. Like the first expression if x was -5 then it would be -5+5=0 which is undefined. Or the second one if x was 5 then it would be 2(5)-10=0 which is also undefined.

    • @GetUpAndWatchVideos
      @GetUpAndWatchVideos 8 лет назад

      Thanks man!!

    • @dontask3033
      @dontask3033 5 лет назад

      In our school we have a dedicated part the domain thing except its called restrictions

    • @manlikeejoe
      @manlikeejoe 4 года назад

      @@dontask3033 yes

    • @manlikeejoe
      @manlikeejoe 4 года назад

      @@trvpgame7710 I am sure he still didn't get it the way you explained it

  • @dattebasa5185
    @dattebasa5185 5 лет назад

    Math is just a talent f this

  • @nozomisaika900
    @nozomisaika900 8 лет назад +7

    sorry i dont get you. your to fast...

    • @HASH562
      @HASH562 7 лет назад +2

      Izumi Haruhiko fast your kidding I put it on 1.5 times faster just to challenge myself 😎

    • @zachellis3789
      @zachellis3789 6 лет назад

      @@HASH562 ☝ 😎

  • @TheSpicyPotatoe
    @TheSpicyPotatoe 8 лет назад

    My highschool makes this too simple . It makes me frustrated

  • @momsspaghetti9970
    @momsspaghetti9970 8 лет назад +4

    note to self. don't ever take a maths course for the first time in summer school

    • @bazooke1014
      @bazooke1014 7 лет назад +1

      Mom's Spagethetti they put this into the algebra 1 category, like tf

  • @mrbeltr5833
    @mrbeltr5833 2 года назад

    You make math a trillion times harder my man’s.

  • @bazooke1014
    @bazooke1014 7 лет назад

    For some reason in the summer school course (grad point) had put this into algebra 1 type stuff. Stupid.

  • @LoveStruckMC66
    @LoveStruckMC66 6 лет назад

    I'm so confused. My math teacher says to cross multiply and then factor and then add them together. I really dont understand

  • @dayvendark2946
    @dayvendark2946 7 лет назад

    Lol I remember watching this I in middle school

  • @abbymontgomery1212
    @abbymontgomery1212 8 лет назад

    what do you mean by the end about the domain.could someone explain please

    • @Kenneth-mj1hk
      @Kenneth-mj1hk 8 лет назад

      Domain means all of the values x can be. In this example, x couldn't be 5 or -5 because it would make the expression undefined

  • @Likon989
    @Likon989 3 года назад

    This is so confusing. Why can't you just factor 2/2x-10 into 1/x-5?

  • @kwstnm7318
    @kwstnm7318 5 лет назад

    Our school sys is teaching this in seventh grade, isnt this supposed to be at like, ninth grade or smth

  • @Actraiser1
    @Actraiser1 10 лет назад

    Oh god, I'm so confused. Reading all these comments talking about how simple it is makes me feel even dumber! OH GOD!

  • @cereal6037
    @cereal6037 8 лет назад +1

    is this good for a 7th grade ?

    • @rambo0718
      @rambo0718 8 лет назад

      legomanx gaming i'm in 8th

    • @rambo0718
      @rambo0718 8 лет назад

      legomanx gaming i'm in 8th

    • @rm.makes.me.smile_
      @rm.makes.me.smile_ 7 лет назад

      legomanx gaming I didn't learn this till 10th grade so probably not but it's always good to know early so it's easier in the future ^_^

    • @cereal6037
      @cereal6037 7 лет назад

      shewolf500 thanks

    • @hananhassani9588
      @hananhassani9588 6 лет назад

      Dude I'm in 8th grade and taking a high school course in AP, why tf are you learning this

  • @wetfloorsproductions5887
    @wetfloorsproductions5887 Год назад

    Kms

  • @noobymcnoobs9992
    @noobymcnoobs9992 2 месяца назад

    Id rather saw my leg off than do more math

  • @mhmdzahrjbr5252
    @mhmdzahrjbr5252 3 года назад

    why don't I have any idea what is my teacher saying in class and I can understand everything you say?? bruh

  • @ghostboy803
    @ghostboy803 9 лет назад +1

    is it me or no sound ???

  • @robertojimenez8168
    @robertojimenez8168 2 года назад

    So many steps 🤔

  • @robnpiper
    @robnpiper 7 лет назад

    I'm lost.

  • @zagrix
    @zagrix 8 лет назад

    wut?

  • @hubbabubba3669
    @hubbabubba3669 7 лет назад

    im lost

  • @prietse
    @prietse 10 лет назад

    iam 13 and i think this is to advance for my age ... do you think this is advance for 13 years old ?

    • @hichkl
      @hichkl 10 лет назад +3

      ya bruh

    • @prietse
      @prietse 10 лет назад

      Demosthenes Theofanopoulos well that kid is not me

    • @DrRichtofenXx
      @DrRichtofenXx 10 лет назад +1

      you will do it sooner or later

    • @seasianproduction6056
      @seasianproduction6056 9 лет назад

      I am also 13 taking a algebra 1 class. It's difficult but doable, so if I can do it you can too.

    • @prekrasnyy8728
      @prekrasnyy8728 9 лет назад

      im 13 and this is our topic. grade 8

  • @elyzagaile5333
    @elyzagaile5333 6 лет назад +9

    You made no sense whatsoever

    • @virtueisdead
      @virtueisdead 4 года назад

      I don't know about you, I understood this fine. It helped a lot. If you can't understand it, you may be missing some fundamentals.

  • @umayrjafar9463
    @umayrjafar9463 5 лет назад

    I think khan has no idea how to explain this

  • @chrisshawpilot
    @chrisshawpilot 7 лет назад

    THANK YOU

  • @Dubstepforthewin101
    @Dubstepforthewin101 9 лет назад

    thank you so much

  • @mauriciomp571
    @mauriciomp571 7 лет назад +1

    Thank you so much.