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(x+1)^2.y
[(x)^2+2(x)(1)+(1)^2].y
[x^2+2x+1].y
=x^2y+2xy+y
2........
x.(y-1)^2
x.[(y)^2-2(y)(1)+(1)^2]
x.[y^2-2y+1]
=y^2x-2yx+x
Espero te sirva
Saludos....