Please answer this question. Ouestion 10, part (v)
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Step-by-step explanation:
(x+y)^3
=(x+y)(x+y)(x+y)
=x(x+y)+y(x+y)(x+y)
=x^2+xy+yx+y^2(x+y)
=(x^2+2xy+y^2)(x+y)
=x(x^2+2xy+y^2)+y(x^2+2xy+y^2)
=x^3+2x^2y+xy^2+yx^2+2xy^2+y^3
=x^3+2x^2y+yx^2+xy^2+2xy^2+y^3
=x^3+3x^2y+3xy^2+y^3
=x^3+y^3+3x^2y+3xy^2
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