(x-y)²(x+y)²(x²+y²)²怎么解,ps²是平方
问题描述:
(x-y)²(x+y)²(x²+y²)²怎么解,ps²是平方
答
(x-y)²(x+y)²(x²+y²)²
=[(x-y)(x+y)]^2*(x^2+y^2)^2
=(x^2-y^2)^2*(x^2+y^2)^2
=[(x^2-y^2)*(x^2+y^2)]^2
=(x^4-y^4)^2
=x^8+y^8-2x^4y^4