化简再求值 4x³(-y³)²-3x×(-x)²(-y²)³
化简再求值 4x³(-y³)²-3x×(-x)²(-y²)³
化简并求值:4x ³(-y ³)² -3x 乘(-x)²(-y²)&s
x³y³-x²y²-xy+1
先化简,再求值:3xy²(-x²y+2x³y²)-4xy(-xy²)·
(x+y)²-(x³+y³)÷(x+y)
已知x+y+z=3,x²+y²+z²=19,x³+y³+z³
1、(4x²y-2x³)÷(-2x)²
1已知X-Y=XY=3求(X+Y)²及X³-Y³的值
单项式除以单项式2a²(x-y)³+3a²(y-x)²
已知x,y满足x²+y²-4x-6y+13=0,求(-y/x³)³÷(-1/xy
有这样一道计算题:“计算(2x³-3x²y-2xy²)-(x³-2xy²
(1)(2x+1)²+|y-3|=0 则2x³-y³=?