Which of the following equations is used in this process?

Question

alones · Answer

Solve $$x^2+9x+7=0$$ by completing the sqaure.

tt0860 · Answer

there is 2 solutions

tt0860 · Answer

x =(9-√53)/-2=-0.860
 x =(9+√53)/-2=-8.140

sweetburger · Answer

You would first divide 9x by 2 to get 4.5 and then square 4.5 so 

x^2 +9x + 20.25 = 13.25

sweetburger · Answer

What are the answer choices?

tt0860 · Answer

was i right @sweetburger

sweetburger · Answer

No clue didnt sit through and bother with the quadratic cus the question is asking for an equation not a solution set for x values

alones · Answer

$$4x^2+36x+81=53$$
$$4x^2+28x+49=58$$
$$4x^2+9x+81=72$$

sweetburger · Answer

Ok so the answer needs to be in whole numbers so we multiply the entire equation above by 4 like this 
4*(x^2 +9x + 20.25 = 13.25) = 

4x^2 +36x +81 =53

alones · Answer

Oooh way to go, thanks sweet<3