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(2x+y)·(4x^2−2xy+y^2)
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(2x+y)·(4x^2−2xy+y^2)

User Jagadeesh Govindaraj
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Distribute (2x+y) throughout (4x^2-2xy+y^2). You should get

8x^3-4x^2y+2xy^2+4x^2y-2xy^2+y^3

Simplify and collect like terms and you should get 8x^3+y^3
User LIU YUE
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