SOLUTION: 2x cubed + 2= 0 I dont understand how 2x breaks down.

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Question 170524: 2x cubed + 2= 0
I dont understand how 2x breaks down.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
2x cubed + 2= 0
2x^3 = -2
x^3 = -1
x^3+1 = 0
(x+1)(x^2-x+1) = 0
x = -1 or x = [1 +- sqrt(1-4)]/2
x = -1 or x = [1+isqrt(3)]/2 or x = [1-isqrt(3)]/2
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Cheers,
Stan H.