Question

Which are steps that could be used to solve 0 = 9(x2 + 6x) – 18 by completing the square? Check all that apply.

Answer 1

Answer:

$18+81=9(x^{2}+6x+9)$

$11=(x+3)^{2}$

Step-by-step explanation:

we have

$0=9(x^{2} +6x)-18$

Adds 18 both sides

$18=9(x^{2} +6x)$

Complete the square

$18+81=9(x^{2}+6x+9)$

$99=9(x^{2}+6x+9)$

Divide by 9 both sides

$11=(x^{2}+6x+9)$

Rewrite as perfect squares

$11=(x+3)^{2}$