Question

factorise the following

Answer 1

(x4-y4)(x4-y4)(x4-y4)+(y4-z4)(y4-z4)(y4-z4)+(z4-x4)(z4-x4)(z4-x4)
we know (x4-y4)=(x2+y2)(x2-y2)

3{(x2+y2)(x2-y2)+(y2+z2)(y2-z2)+(z2-x2)(z2+x2)}