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OpenStudy (anonymous):
5x^2 - 21x - 20 ________________ 5x^2-16x-16
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OpenStudy (anonymous):
factor it. \[(5x+4) (x-5) \div (5x+4) (x-4)\] then cancel \[5x+4\] the answer would be \[\left(\begin{matrix}x-5 \\ x-4\end{matrix}\right)\]
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