SOLUTION: Factor completely the polynomial x^4 -16

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Question 695361: Factor completely the polynomial x^4 -16
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
x%5E4+-16
%28x%5E2%29%5E2-%284%29%5E2
using the identitity a%5E2-b%5E2=%28a%2Bb%29%28a-b%29
we get
%28x%5E2%2B4%29%28x%5E2-4%29
using the same identity
%28x%5E2%2B4%29%28x%2B2%29%28x-2%29