已知y/x-x/y=5,求分式3x^2+xy-3y^2/2x^2-xy-2y^2

来源：学生作业帮编辑：大师作文网作业帮分类：数学作业时间：2024/11/19 17:58:06

y/x-x/y=5
(y²-x²)/(xy)=5 /等式左边通分
x²-y²=-5xy
(3x²+xy-3y²)/(2x²-xy-2y²)
=[3(x²-y²)+xy]/[2(x²-y²)-xy]
=[3·(-5xy)+xy]/[2·(-5xy)-xy]
=(-14xy)/(-11xy)
=14/11

已知x-y/xy=3,求分式2x+3xy-2y/x-2xy-y的值. 已知2x-3y=0,求分式x^2+xy-y^2/2x^2+xy-y^2 已知1/x-1/y=3,求分式(2x+3xy-2y)/(x-2xy-y) 已知1/x+1/y=3,求分式3x-2xy+3y/x+xy+y的值已知,1/x+1/y=5.,求分式3x+xy+3y/x-2xy+y的值初中数学分式已知x/y=2,求（x*x-xy+3y*y）/x*x+xy+6y*y的值若(y-x)/xy=3,求分式(2x+3xy-2y)/(x-2xy-y)的值若y-x/xy=3,求分式2x+3xy-2y/x-2xy-y 已知y/x-x/y=5,求分式3x^2+xy-3y^2/2x^2-xy-2y^2 已知1/x-1/y=5 求分式-x+xy+y/2x+7xy-2y 已知1/x-1/y=5,求分式y+xy-x/2x+7xy-2y的值. 已知1/X-1/y=5,求分式(y+xy-x)/(2x+7xy-2y)的值