You need the outer and inner to sum to -2x. 3x * -2 = -6x 4 * x = 4x -6x + 4x = -2x You are basically just doing FOIL in reverse. This is known as factoring by trial and error or reverse FOIL.
You have: 1/(2x) + 2/(4x) = 12 First off, you can reduce the fraction 2/(4x) since 2/4 = 1/2 1/(2x) + 1/(2x) = 12 You can now change 1/(2x) + 1/(2x) into 2 * 1/(2x) 2 * 1/(2x) = 12 2/(2x) = 12 Simplify 2/2 = 1 1/x = 12 At this point, you have a lot of options. Easiest to understand is cross multiply: 1/x = 12/1 12x = 1 x = 1/12 Check: 1/(2 * 1/12) + 2/(4 * 1/12) = 12 1/(1/6) + 2/(1/3) = 12 6 + 6 = 12 12 = 12 This tells us that 1/12 is the correct solution.
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Sir, u saved my life
I'm glad to hear the video was helpful!
You do not know how much you saved my ass from the embarrassment, I was about to get 0 in my quiz THANK YOU!
You are very welcome!
9:55 I don’t understand how do we get the answer of the number in the middle
You need the outer and inner to sum to -2x.
3x * -2 = -6x
4 * x = 4x
-6x + 4x = -2x
You are basically just doing FOIL in reverse. This is known as factoring by trial and error or reverse FOIL.
4:58 for this one what do you do in the numerator?
You are finding the LCD, so we just look at the denominators.
Super concise and helpful
Glad it was helpful! Thanks for the nice comment 😎
Sir i know this so late but is the answer of 1/2x + 2/4×=12?
What are your steps so far?
@@Greenemath uhmm my lcd is 4x but when i do the checking the answer is wrong
You have:
1/(2x) + 2/(4x) = 12
First off, you can reduce the fraction 2/(4x) since 2/4 = 1/2
1/(2x) + 1/(2x) = 12
You can now change 1/(2x) + 1/(2x) into 2 * 1/(2x)
2 * 1/(2x) = 12
2/(2x) = 12
Simplify 2/2 = 1
1/x = 12
At this point, you have a lot of options. Easiest to understand is cross multiply:
1/x = 12/1
12x = 1
x = 1/12
Check:
1/(2 * 1/12) + 2/(4 * 1/12) = 12
1/(1/6) + 2/(1/3) = 12
6 + 6 = 12
12 = 12
This tells us that 1/12 is the correct solution.
Sir I want the video where you add these terms
ruclips.net/video/Yj74aLnbuDs/видео.html
Thankyouu it really helped❤
Glad it helped!
i search the wrong thing lol im looking for the PQF the lenses
1/f = 1/p + 1/q
Ok weak
Cartman has entered the room :)
@@Greenemaththis was really helpful, this is the only thing found