已知A=8x2y-6xy2-3xy,B=7xy2-2xy+5x2y,若A+B-3C=0,求C-A.
已知A=8x2y-6xy2-3xy,B=7xy2-2xy+5x2y,若A+B-3C=0,求C-A.
已知A=x3-2y3+3x2y+xy2-3xy+4,B=y3-x3-4x2y-3xy-3xy2+3,C=y3+x2y+2
已知A=x3+3x2y-5xy2+6y3-1,B=y3+2xy2+x2y-2x3+2,C=x3-4x2y+3xy2-7y
已知x+y=-5,xy=7,求x2y+xy2-x-y的值.
已知(x+3)2+▕x-y+10▏=0求代数式5x2y-【2x2-(3xy-xy2)-3x2】-2xy2-y2的值.
若x-y=3,xy=-2,则xy2-x2y的值是______.
已知(x-2)2+|y+1|=0,求5xy2-[2x2y-(3xy2-2x2y)]的值.
已知x+y=6,xy=-3,则x2y+xy2=
若x+y=5,xy=6,则x2y+xy2的值为______.
已知x+y=3,xy=1,求代数式①x2y+xy2;②x2+y2的值.
若实数x,y满足xy+x+y+7=0,3x+3y=9+2xy,则x2y+xy2=______.
已知x+y=6,xy=4,则x2y+xy2的值为______.