Evaluate
x\left(7-9x^{8}\right)
Factor
x\left(7-9x^{8}\right)
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5x+2x-x^{9}-8x^{9}
Combine 3x and 2x to get 5x.
7x-x^{9}-8x^{9}
Combine 5x and 2x to get 7x.
7x-9x^{9}
Combine -x^{9} and -8x^{9} to get -9x^{9}.
x\left(-9x^{8}+7\right)
Factor out x. Polynomial -9x^{8}+7 is not factored since it does not have any rational roots.
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