计算:[6xy2(x2-3xy)-(-3x2y3)]÷(3x2y2)
计算:[6xy2(x2-3xy)-(-3x2y3)]÷(3x2y2)
计算:[x(x2y2-xy)-y(x2+x3y)]÷3x2y.
计算:[x(x2y2-xy)-y(x2-x3y)]÷3x2y.
计算:3xy(x2y-xy2+xy)-xy2(2x2-3xy+2x)因式分解
(2x2y-2xy2)-[(-3x2y2+3x2y)+(3x2y2-3xy2)],其中x=-1,y=2.
化简并求值:(2x2y-2xy2)-[(-3x2y2+3x2y)+(3x2y2-3xy2)],其中x=−12,y=2
先化简,再求值:(-3xy)2(x2+xy-y2)-3x2y2(3x2+3xy+y2),其中x=-43
多项式x5y2+2x4y3-3x2y2-4xy是( )
已知(x+3)2+▕x-y+10▏=0求代数式5x2y-【2x2-(3xy-xy2)-3x2】-2xy2-y2的值.
化简求值:[x(x2y2-xy)-y(x2-x3y)]÷3x2y,其中x=3,y=-1.
如何用excel画函数(x2+y2-1)3-x2y3=0的曲线图
如果A=2x5-3x2y3+2y5,B=2x2+xy-3y2,C=x2-xy-7y2,且A+D-[B-(C-A)]=0,