Factorise (x-y) ²+(y-z) ³+(z-x) ³

1.	Factorise (x-y) ²+(y-z) ³+(z-x) ³
Answer» (x -y) 2 + (y-z)3 + (z -x)3= x2 - 2xy + y2 +\xa0y3−3y2z+3yz2−z3 + z3−3z2x+3zx2−x3=−x3+\xa0y3+x2+ y2- 2xy−3y2z+3yz2−3z2x+3zx2

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