step by step please ...
(x+y)(x+y)(x+y)
im a grade 9, please show steps
(x+y)(x+y)(x+y)
im a grade 9, please show steps
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(x+y)^3
= (x+y)(x+y)(x+y)
= (x+y) (x^2+xy+xy+y^2)
= (x+y) (x^2+2xy+y^2)
= x^3+2x^2y+xy^2 +yx^2+2xy^2+y^3
= x^3+3x^2y+3xy^2+y^3
= (x+y)(x+y)(x+y)
= (x+y) (x^2+xy+xy+y^2)
= (x+y) (x^2+2xy+y^2)
= x^3+2x^2y+xy^2 +yx^2+2xy^2+y^3
= x^3+3x^2y+3xy^2+y^3