（x+y）^6/(x+y)^4-(x-y)^5/(x-y)^3 化简 .._数学解答

（x+y）^6/(x+y)^4-(x-y)^5/(x-y)^3 化简 ..

人气：362 ℃　时间：2020-06-20 01:13:32

解答

（x+y）^6/(x+y)^4-(x-y)^5/(x-y)^3
=（x+y）^(6-4)-(x-y)^(5-3)
=（x+y）^2-(x-y)^2
=(x+y+x-y)(x+y-x+y)
=(2x)(2y)
=4xy