化简：x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y)

来源：学生作业帮编辑：灵鹊做题网作业帮分类：数学作业时间：2024/04/28 12:18:34

[(x-y)/(x+3y)]/[(x^2-y^2)/(x^2+6xy+9y^2)]-xy/(x+y)
=(x-y)/(x+3y) * (x+3y)^2/(x-y)(x+y)-xy/(x+y)
=(x+3y)/(x+y)-xy/(x+y)
=(x-xy+3y)/(x+y)
=1-y(x-2)/(x+y)

化简：x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y) (x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y) 1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y) 化简:x-y/x+3y÷x^2-y^2/x^2+6xy+9y^2-2y/x+y 已知xy=-2,x-y=3,求（x+y)（x-y)-y^2+（x-y)^2-（6x^2y-2xy^2)÷2y (x^2-xy)y÷y-x/xy怎么做? （x^2+xy/x-y)/（xy/x-y)计算（xy-x^2)乘以(xy)/(x-y) (x+y)(x-y)-(2xy+3y)平方因式分解：x×x-xy-2y×y-x-y [x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y x^2-xy-6y^2+3xy+y+2