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OpenStudy (anonymous):
multiply (3x + 3y)^2(2x+3y)
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OpenStudy (anonymous):
Foil it first: (3x+3y)(3x+3y)*(2x+3y) (9x^2+9xy+9xy+9y^2)*(2x+3y) (9x^2+18xy+9y^2)*(2x+3y) 18x^3+27x^2y+36x^2y+54xy^2+18xy^2+27y^3 Simplify like terms---->18x^3+63x^2y+72xy^2+27y^3
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