SOLUTION: Find all real and imaginary zeros of the following polynomial equation: m(x)= x^3-8

Question 671773: Find all real and imaginary zeros of the following polynomial equation:
m(x)= x^3-8
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Find all real and imaginary zeros of the following polynomial equation:
m(x)= x^3-8
-----
x^3-8 = 0
(x-2)(x^2+2x+4) = 0
-----
Solve the quadratic:
x = [-2+-sqrt(4-8)]/2
x = [-2 +- sqrt(-4)]/2
x = [-2 +- 2i]/2
---
x = -1+i or x = -1-i or x = 2
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Cheers,
Stan H.
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