简便计算已知x=11/75,y=25/22,求(x=y)^2-(x-y)^2 的值

分类: 作业答案 • 2022-05-16 11:23:22

问题描述：

答

(x=y)^2-(x-y)^2
=2x*2y
=4xy=4*11/75*25/22=2/3

答

(x+y)^2-(x-y)^2
=(x+y+x-y)(x+y-x+y)
=4xy
=4×11/75×25/22
=2/3

答

(x+y)^2-(x-y)^2
=(x+y+x-y)(x+y-x+y)
=2x*2y
=4xy
=4×11/75×25/22
=2/3

简便计算 已知x=11/75,y=25/22,求(x=y)^2-(x-y)^2 的值