(-2X²Y³)²×(XY)³
[-xy/(x-y)²]²×(y²-xy/x)³
先化简,再求值:{xy(x²-3y)+3xy²}(-2xy)+x³y²(2x-y
x³y-2x²y²+xy³
-2y³+(3xy²-x²y)-2(xy²-y³)
x²-2xy+y²分之x²+2xy-3y³如何因式分解
因式分解:(x+y)³+2xy-2x²y-2xy²-1
计算:(-7x²y)(2x²y-3xy³+xy)
计算:-2x²y(-2xy²)²+(2xy)³·(xy²)
-x²y+2xy²-y³ 因式分解
已知x+y=2,xy=1/2,求x³y+2x²y²+xy³
【分解因式】 x²-xy+4分之1y² x²y-2xy²+y³ a(x
计算x²y³-2x(4xy³)