carealee carealee

19-02-2018
Mathematics

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What is the product of -2x^3 + x -5 and x^3 – 3x?

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sqdancefan sqdancefan

19-02-2018

(-2x^3 +x -5) * (x^3 -3x)
= x^6*(-2*1) +x^4*(-2*-3 +1*1) +x^3*(-5) +x^2*(-3) +x(-5*-3)
= -2x^6 +7x^4 -5x^3 -3x^2 +15x

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