SOLUTION: Factor x^4 - 18x^2 + 81

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Question 39588This question is from textbook
: Factor x^4 - 18x^2 + 81 This question is from textbook

Answer by Nate(3500) About Me  (Show Source):
You can put this solution on YOUR website!
x%5E4+-+18x%5E2+%2B+81 find factors of the product of the leading coefficient and the constant that sum up to -18
They are: -9 and -9
x%5E4+-+9x%5E2+-+9x%5E2+%2B+81
%28x%5E4+-+9x%5E2%29+%2B+%28-+9x%5E2+%2B+81%29
%28x%5E2%29%28x%5E2+-+9%29+-+9%28x%5E2+-+9%29
%28x%5E2+-+9%29%28x%5E2+-+9%29