当x=3,y=7时,求分式(xy+2y)-(x+2)/x^2-4的值
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/01 04:51:38
![当x=3,y=7时,求分式(xy+2y)-(x+2)/x^2-4的值](/uploads/image/z/595718-62-8.jpg?t=%E5%BD%93x%3D3%2Cy%3D7%E6%97%B6%2C%E6%B1%82%E5%88%86%E5%BC%8F%28xy%2B2y%29-%28x%2B2%29%2Fx%5E2-4%E7%9A%84%E5%80%BC)
当x=3,y=7时,求分式(xy+2y)-(x+2)/x^2-4的值
当x=3,y=7时,求分式(xy+2y)-(x+2)/x^2-4的值
当x=3,y=7时,求分式(xy+2y)-(x+2)/x^2-4的值
(xy+2y)-(x+2)/x^2-4
=【y(x+2)-(x+2)】/(x+2)(x-2)
=(y-1)/(x-2)
=(7-1)/(3-2)
=6
当x=3,y=7时,求分式(xy+2y)-(x+2)/x^2-4的值
当x/y=3/4时,求分式(xy+y^2)/(x^2-xy)的值
当1/x-1/y=2时,求分式2x+3xy-2y/x-2xy-y的值如题
当y分之x=3时,x求分式的平方-xy+y的平方分之x的平方+2xy-3y方的值
当x=3,y=7时,求分式(xy+2y)-(x-2)分之x²-4的值
初三数学 代值计算当x/y=3/4时,求分式(xy+y^2)/(x^2-xy)的值
已知x-y=3xy,求分式3x+2xy-3y/x-2xy-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x-y/xy=3,求分式2x+3xy-2y/x-2xy-y的值.
当x-y=2xy时,求4x-3xy-4y/xy
1、当1/x-1/y=5时,求分式(3x+5xy-3y)÷(x-3xy-y)的值.
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-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2x-3y=0,求分式x^2+xy-y^2/2x^2+xy-y^2
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)