Question

Which of the following correctly completes the square for the equation below?

x^2 + 12x = 0

A. (x + 3)^2 = 9
B. (x + 12)^2 = 144
C. (x + 6)^2 = 36
D. (x+3/2)^2=9/2

Answer 1

Once again, the term with x on it, divide it by 2, then square it. The number you get should lead you to the answer.

Answer 2

so D?

Answer 3

@Erak

Answer 4

12/2, then square that

Answer 5

im still confused

Answer 6

how you get D. right ?

Answer 7

Okay, 12/2 = 6, right? what's 6^2? It's part of completing the square

Answer 8

oh 36

Answer 9

so C

Answer 10

yeah

Answer 11

rewrite this equation in this way

x^2 +2*6x + b^2 = 0

so than you know that b=6 how many will be b^2 ?