SOLUTION: Question: Which of the following are the solutions to x^2 + 12x = 9, as found by completing a punnet square? Answer Choices: A. 3√5 + 6, 3√5 - 6 B. √

Algebra ->  Functions -> SOLUTION: Question: Which of the following are the solutions to x^2 + 12x = 9, as found by completing a punnet square? Answer Choices: A. 3√5 + 6, 3√5 - 6 B. √      Log On


   

Question 871237: Question:
Which of the following are the solutions to x^2 + 12x = 9, as found by completing a punnet square?

Answer Choices:
A. 3√5 + 6, 3√5 - 6
B. √3/2, -(√3/2)
C. -6 - 3√5, -6 + 3√5
D. √39, -√39

Please explain how you got the answer.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
I think you mean just completing the square.
x%5E2%2B12x=9
x%5E2%2B12x%2B36=9%2B36
%28x%2B6%29%5E2=45
x%2B6=0+%2B-+3sqrt%285%29
x=-6+%2B-+3sqrt%285%29