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-y(3x^ 3-4x^ 2y+xy^ 2+7y^3)

 Feb 18, 2022
 #1
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+2

Multiplying by - y means that the coefficient of each term will have a sign change and that each term will have one more y-value.

-3x3y + 4x2y2 - xy3 - 7y4

 Feb 18, 2022

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