计算题:(x^2+y)(x^2-y)-(-x)^2×(-x^2)
问题描述:
计算题:(x^2+y)(x^2-y)-(-x)^2×(-x^2)
答
(x^2+y)(x^2-y)-(-x)^2×(-x^2)
=x^4-y^2-x^2×(-x^2)
=x^4-y^2+x^4
=2x^4-y^2