SOLUTION: factor completely. state if polynomial is prime? x^4 + 4x^3 - 2x -8

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Question 226017: factor completely. state if polynomial is prime?
x^4 + 4x^3 - 2x -8
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
x^4 + 4x^3 - 2x -8
=x^3(x+4)-2(x+4)
=(x^3-2)(x+4)
Because the polynomial is factorable it is NOT prime.
.
Ed