SOLUTION: Is x=-1 a zero of the function P(x)=x^3-3x^2-x+3? Why or Why not?

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Question 314379: Is x=-1 a zero of the function P(x)=x^3-3x^2-x+3? Why or Why not?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
P%28-1%29=%28-1%29%5E3-3%28-1%29%5E2-%28-1%29%2B3=-1-3%2B1%2B3=0
Yes, because P%28-1%29=0 which is the definition of a zero.