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Multiply (x-9)(x^7+x^6+x^5+x^4+x^3+x^2+x+1).

 Sep 1, 2017
 #1
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(x9)(x7+x6+x5+x4+x3+x2+x+1)

 

x8+x7+x6+x5+x4+x3+x2+1x9x79x69x59x49x39x29x9

 

x88x78x68x58x48x38x28x9

.
 Sep 1, 2017

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