Question

factorise x^3-xy^2-x^2y+y^3​

Answer 1

x^3-xy^2-x^2y+y^3

= x(x^2-y^2)-y(x^2-y^2)

= (x^2-y^2)(x-y)

=(x+y)(x-y)(x-y)

=(x+y)(x-y)^2