Solve x2 + 6x = 9 for x by completing the square.

a. x = - 6

b. x = 0

c. x equals plus or minus square root of 18 minus 3

d. x = x equals plus or minus square root of 18 plus 3

Answer: c. x equals plus or minus square root of 18 minus 3

Step-by-step explanation:

1. x^2+6x + (6/2) ^2=9 + (6/2) ^2

2. (x+6/2) ^2=18

3. (x+3) ^2=18

Answer: x = plus or minus root 18 minus 3

Simplified would be x plus or minus 3 root 2 minus 3

The right answer is C. Soo good luck