(x^2y^2)^2(x+3)^2(x-y)^2 今天就要,
问题描述：
(x^2y^2)^2(x+3)^2(x-y)^2 今天就要,
答
原式=(x^4y^4)(x²+6x+9)(x²-2xy+y²)=(x^4y^4×x²+x^4y^4×6x+x^4y^4×9)(x²-2xy+y²)=(x^6y^4+6x^5y^4+9x^4y^4)(x²-2xy+y²)=x^6y^4×x²+x^6y^4×(-2xy)+x^6y^4×y²...