SOLUTION: how to factor x^13-15x^9-16x^5?

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Question 912352: how to factor x^13-15x^9-16x^5?
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
how to factor
x^13-15x^9-16x^5?
=x^5(x^8-15x^4-16)
=x^5(x^4+1)(x^4-16)
=x^5(x^4+1)(x^2+4)(x^2-4)
=x^5(x^4+1)(x^2+4)(x+2)(x-2)