Упростить вырожение (x-y)(x+y)(x2+y2) (в последней скобочки x и y во второй степени,)
(x^2 - y^2)(x^2+y^2)= x^4-y^4
(x-y)(x+y)(x2+y2)= (x-y)(x+y)(x-y)(x+y)= 1
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(x^2 - y^2)(x^2+y^2)= x^4-y^4
(x-y)(x+y)(x2+y2)= (x-y)(x+y)(x-y)(x+y)= 1