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OpenStudy (anonymous):
(y-9)(y^2+9y+81)
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jimthompson5910 (jim_thompson5910):
(y-9)(y^2+9y+81) y(y^2+9y+81)-9(y^2+9y+81) (y)*(y^2)+(y)*(9y)+(y)*(81)+(-9)*(y^2)+(-9)*(9y)+(-9)*(81) y^3+9*y^2+81*y-9*y^2-81*y-729 y^3-729 So (y-9)(y^2+9y+81) = y^3-729 Note: this is a difference of cubes
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