乘法分式若x-2y=15,xy=-25,求x^2+4y^2-1的值
若(y-x)/xy=3,求分式(2x+3xy-2y)/(x-2xy-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(y+xy-x)/(2x+7xy-2y)的值
已知1/x+1/y=3,求分式3x-2xy+3y/x+xy+y的值
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
解一道分式题已知1/x-1/y=3 求分式(4x-5xy-4y)/(3x-2xy-3y)的值.
已知x-y/xy=3,求分式2x+3xy-2y/x-2xy-y的值.
若x+2y=0,xy不等于0,求分式x²+2xy/xy+y²的值
若X/1-y/1=3 求分式:x-2xy-y/2x+3xy-2y
1.已知3/x=4/y,求分式x^2+2xy/3x^2-y^2的值.2.已知1/x-1/y=3,求分式3x+2xy-3y
1/x-1/y=4,求分式(3x+xy-3y)/(x-2xy-y)