SOLUTION: X4-9

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Question 353739: X4-9
Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
X%5E4-9
Can be rewritten as:
%28X%5E2%29%5E2+-+3%5E2
Which is a "difference of squares" -- which factors to:
%28X%5E2+-+3%29%28x%5E2+%2B+3%29