(3x-2y)(4x-5y)-11(x+y)(x-y)+5xy,已知X=3又1/2,y=2又1/3
(3x-2y)(4x-5y)-11(x+y)(x-y)+5xy,已知X=3又1/2,y=2又1/3
(3x-2y)(4x-5y)-11(x+y)(x-y)+5xy x=3又2分之一 y=负2又2分之1
已知|x+2|+|y-3|=0,求-2又1/2x-5/3y+4xy的值
已知x,y>0 2x+y+3=xy 求5x+4y最小值
已知x=1/3,y=-1/2,求代数式x-(x+y)+(x+2y)-(x+3y)+(x+4y)-(x+5y)+...-(
已知xy/x+y=1/2,则代数式3x-5xy+3y/-x+3xy-y=
已知1/x+1/y=5,求2x-3y+2y/-x+2xy-y
已知1/x+1/y=5,求(2x-3y+2y)/(x+2xy+y)的值
已知x/1-y/1=3,则5x+xy-5y/x+2y-y的值为
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
若x+y=-1,则x^4+5x^3y+x^2y+8x^2y^2+xy^2+5xy^3+y^4=( )
已知1/x+1/y=5 求2x-3xy+2y/3x+2xy+3y