如果x^2-y^2=4,那么(x-y)^2*(x+y)^2的结果是?
问题描述:
如果x^2-y^2=4,那么(x-y)^2*(x+y)^2的结果是?
答
(x-y)²(x+y)²=[(x-y)(x+y)]²=(x²-y²)²=16.
如果x^2-y^2=4,那么(x-y)^2*(x+y)^2的结果是?
(x-y)²(x+y)²=[(x-y)(x+y)]²=(x²-y²)²=16.