(x+y)^3+(x-y)^3

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1 Answer

(x+y)^3+(x-y)^3

expand the bracketed terms.

x^3 + 3x^2.y + 3x.y^2 + y^3 + x^3 - 3x^2.y + 3x.y^2 - y^3

x^3 + 3x.y^2 + x^3 + 3x.y^2

2(x^3 + 3x.y^2)

2x(x^2 + 3y^2)

by Level 11 User (81.5k points)

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