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

18 + 81 = 9 (x2 + 6x + 9)

18 + 9 = 9 (x2 + 6x + 9)

18 + 36 = 9 (x2 + 6x + 36)

11 = (x + 3) 2

square root 342 = (x + 6) 2

square root 99 = (x + 3) 2

The correct answers are:

A) 18+81=9 (x^2+6x+9)

D) 11 + (x+3) ^2

Answer: To solve this by completing the square, we want to get it to the form of: (x + 3) ^2 = 9

There are multiple ways to get there.

First we could divide by 9 to get.

x^2 + 6x = 0

Then, add 9 to both sides to get:

x^2 + 6x + 9 = 9

Factor the left side:

(x + 3) ^2 = 9

Now, you can solve this equation by completing the square.

(*I think you have a typo in your answer choices)