已知3/x-2/y=3 则2x-3y-xy/7xy+9y-6x 等于?
已知3/x-2/y=3 则2x-3y-xy/7xy+9y-6x 等于?
已知x+y=3 xy=-2 求代数式 (3xy+10y)+[5x-(2xy+2y-3x)]的值
(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)
已知x-y=4,xy=-2,则代数式(3x-4y+5xy)-(2x-3y-2xy)的值是多少
由已知x+y=-2,xy=3那么2(x+xy)-[(xy-3y)-x]-(-xy)等于多少?
已知X+Y分之XY等于3,求-X+3XY-Y分之2X-3XY+2Y
已知2x-3xy+y=0.求x:y的值.
已知x-y=3xy,且xy不等于0,则-3x+6xy+3y/(7x-5y)-9xy-(3x-y)
因式分解x^3y-6x^2y^2+9xy^3
x+y=3Xy,求X+y+2Xy分之2X+2y-Xy的值是多少?
(3x+2y)(9x²-6xy+4y²﹚
(3x+2y)(9x²-6xy+4y²﹚