化简x³-3x²+6xy-12y²+8y³和x³-2x²+1
化简x-y分之x + x³-2x²y+xy²分之y³ ÷ y²-x
多项式因式分解 1,(x-y)³-(x-y)²(x+y) 2,x(x²-xy)-(4x
因式分解(1) 3x²+6xy(2)x³y-2x²y²+xy³
[-xy/(x-y)²]²×(y²-xy/x)³
因式分解①9(x+y)²-12(x+y-1/3) ②8-6x-6y+(x+y)²③xy³-
一.x-y=2,则x²-2xy+y²= 二.x-y=-1,xy=3,则x³y-2x
x³y-2x²y²+xy³
先化简,再求值:{xy(x²-3y)+3xy²}(-2xy)+x³y²(2x-y
x四次方+x³-3x²-4x-4 x(x-1)+y(y+1)-2xy (x-2)³-(y-
化简 (x+y)(x²-xy+y²) ; 3(2x-1)(x+6)-5(x-3)(x+6)
因式分解3x-12x³,x²+y²-1-2xy
x²+3y-xy-3x= x³-x²-x+= x²-1-2xy+y= a