SOLUTION: Solve the equation by completing the square x^2 + 6x − 12 = 0

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Question 558703: Solve the equation by completing the square
x^2 + 6x − 12 = 0
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
Rewrite as (x+3)^2 - 21 = 0.

(x+3)^2 = 21

x+3 = +/- sqrt(21)

x = +/- sqrt(21) - 3