SOLUTION: Solve by completing the square and separate with comma: x^2 + 3x - 40 = 0 Thanks in advance!!

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Question 319319: Solve by completing the square and separate with comma:
x^2 + 3x - 40 = 0
Thanks in advance!!
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Solve by completing the square and separate with comma:
x^2 + 3x - 40 = 0
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x^2 + 3x + (3/2)^2 = 40+(3/2)^2
(x+(3/2))^2 = 169/4
(x+3/2) = 13/2 or x+(3/2) = -13/2
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x = 5 or x = -8
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Cheers,
Stan H.