4x方y/(x-2y)(x+2y)怎么算[x方/x-2y]-4x方y/(x-2y)(x+2y)=?_数学解答

4x方y/(x-2y)(x+2y)怎么算
[x方/x-2y]-4x方y/(x-2y)(x+2y)=?

人气：354 ℃　时间：2020-05-15 06:30:58

解答

x^2/(x-2y) -4x^2y/(x-2y)(x+2y)
=[x^2(x+2y)-4x^2y]/(x-2y)(x+2y)
=x^2(x+2y-4y)/(x-2y)(x+2y)
=x^2(x-2y)/(x-2y)(x+2y)
=x^2/(x+2y)