Question

一道完全平方公式的计算题：(x-y)²（x+y)²（x²+y²）² （

Answer 1

(x-y)²（x+y)²（x²+y²）²

=[(x-y)(x+y)]²（x²+y²）²

=(x²-y²)²（x²+y²）²

=[(x²-y²)（x²+y²）]²

=(x^4-y^4)²

=x^8-2x^4y^4+y^8