answer please
(x + y)⁴ - (x -y)⁴
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=(x^+4x^3y+6x^2y^2+4xy^3+y^4)-(x^-4x^3y+6x^2y^2-4xy^3+y^4)
=(x^+4x^3y+6x^2y^2+4xy^3+y^4-x^+4x^3y-6x^2y^2+4xy^3-y^4)
=4x^3y+ 4xy^3 +4x^3y+4xy^3
=8x^3y+8xy^3
hope it's helpful
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