因式分解 4xy²-4x²y-y³
因式分解:m³-2m²-4m+8;x²-2xy+y²-9
习题15.4 因式分解 5,(3)4xy²-4x²y-y ³ (4)3ax²-3
先化简,再求值:3xy²(-x²y+2x³y²)-4xy(-xy²)·
x³y³-x²y²-xy+1
16x³-24x²y²+12xy^4-2y^6
3x²-4xy+y²
(x²+4y²)²-16x²y² 因式分解
因式分解:3x²+5xy-2y²+x+9y-4
因式分解-4xy²-4x²y-y的三次方
1.已知2x-y=1/3,xy=3,求4x³y-4x²y²+xy³的值(要有计算
化简再求值 4x³(-y³)²-3x×(-x)²(-y²)³
已知x,y满足x²+y²-4x-6y+13=0,求(-y/x³)³÷(-1/xy