x³-x+1是几次几项式 x³-2x²y³+3y²
多项式-5x³y²+2x的四次方y³-3分之1x²+5y+1是几次几项式
多项式-½x³y+3xy³-5x²y³-1是几次几项式,
求因式分解(x-y)²-2(x-y)³和(x+y)(x-y)-x(x-y)
合并同类项:-6x²y-x+5x²y-2x+x³y+3x
多项式因式分解 1,(x-y)³-(x-y)²(x+y) 2,x(x²-xy)-(4x
约分下列分式(x-y)/(y-x)³(x²-9)/(6-2x)(x²-1)/(x-x
若x、y满足2x+y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值
(x-y)的四次方(x-y)-2(x-y)²(y-x)³等于?
x四次方+x³-3x²-4x-4 x(x-1)+y(y+1)-2xy (x-2)³-(y-
(x-y)³+9(x-y)-6(x-y)²
(x-y)³(x-y)²(y-x)等于多少
运用乘法公式(x+y+1)(x+y-1)(2x-y-3)²(2x-y-3)³【(x+2)(x-2)】