Question

What equation results from completing the square and then factoring?

x^2 + 4x = 12
A. (x + 2)2 = 8
B. (x + 2)2 = 10
C. (x + 2)2 = 16
D. (x + 2)2 = 14

Answer 1

@iambatman

Answer 2

any idea?

Answer 3

no i dont know how do i solve for this?

Answer 4

Well for completing the you take one half of the coefficient of x, square it and then add it to both sides, so the "4x" (4/2) = 2^2 = 4
\[x^2+4x+4=12+4 \implies x^2+4x+4=16\]
Now you can facto the left side to get
\[(x+2)^2=16\]

Answer 5

Does that make sense?

Answer 6

ok thank you big help my quiz is all questions like that :) really helps

Answer 7

I did not know it was a quiz, we are not allowed to help on quiz's as that's for you to test what you've learned but since you already know the steps, I prefer you go over them yourself and do the same with the rest, and not cheat. Good luck.

Answer 8

study guide for a quiz we get a exact copy of the quiz to study

Answer 9

Oh ok, in that case, I hope that helped! Good luck on your quiz friend!

Answer 10

it did and i really appreciate it

Answer 11

No problem ^.^