如果(x+1)2+|y+2|=0,求代数式5xy-3/2x3y2-4xy+1/2y2x3-1/2xy-3x3y2-y2x
已知(x+1)^2+|y+2|=0,求代数式5xy-3/2x3y2-4xy+1/2y2x3-1/2xy-3x3y2的值
如果x+y=-3,xy=-2,那么x3y2+x2y3的值为______.
已知xy=-1,求3xy2(x-x3y2-12
当x=2011,y=2012时,求代数式3x3-4x3y2+3x2y+2x2+4x3y2+2x2y-5x2-5x2y+x
已知xy/x+y=1/2,则代数式3x-5xy+3y/-x+3xy-y=
已知x^2+y^2=7,xy=-1,求代数式:5x^2-3xy-4y^2-11xy+2y^2-7x^2
已知x^2+y^2=7,xy=-1,求代数式:5x^2-(3xy+4y^2)-(11xy-2y^2)-7x^2
已知(x+1)²+|y-1|=0,求2(xy-5xy²)-(3xy²-xy)得值
1、已知x+y=-2,xy=3,求代数式2(x+xy)-[(xy-3y)-x]-(-xy)
已知xy^2=2,求代数式xy^2*(-x^2y^2)*(1/2xy^3)^2
已知xy满足(x+1)^2+y-2=0 求代数式-2xy+(1/2x^2y^2-3y)*2x+6xy
当x=3,y=-1/3时求代数式3x*xy-[2xy*y-2(xy-2/3x*xy)+xy]+3xy*y的值