2x+2y分之x-y于x^2-y^2分之x 通分初二习题要完整步骤_数学解答

2x+2y分之x-y于x^2-y^2分之x 通分初二习题要完整步骤

人气：213 ℃　时间：2020-08-21 06:28:24

解答

2x+2y=2（x+y)
x²-y²=(x+y)(x-y)
所以
(x-y)/(2x+2y)=(x-y)²/[1(x+y)(x-y)]
x/(x²-y²)=2x/[1(x+y)(x-y)]