有这样一道题:“求(2x³-3x²y-2xy²)-(x³-2xy²+y
先化简,再求值:{xy(x²-3y)+3xy²}(-2xy)+x³y²(2x-y
有这样一道计算题:“计算(2x²-3x²y-2xy²)-(x²-2xy²
计算:(-7x²y)(2x²y-3xy³+xy)
x-y/x²÷x²-2xy+y²/xy*(xy-x²)
-2y³+(3xy²-x²y)-2(xy²-y³)
有这样一道题,计算(2x立方-3x平方y-2xy平方)-(X立方-2XY立方)+(-X立方+3XY-Y立方)
邱老师给学生出了一道题:当x=2014.y=2013时.求[2x(x²y-xy²)+xy(2xy-x
已知x+y=2,xy=1/2,求x³y+2x²y²+xy³
已知x:y=3:2,求(x²+3xy)/(xy+2xy)
2x+y=0,求4x²+2xy(x+y)+y³
x³y-2x²y²+xy³
x²-2xy+y²分之x²+2xy-3y³如何因式分解