2x x²-1
2(x²-1²)
1-x²+2xy-y²
化简~(x²+3x+9/x²-27)+(6x/9x-x²)-(x-1/6+2x)
(1)(x²-2x)²+2(x²-2x)+1
分解因式(2X²-3X+1)²-22X²+33X-1
因式分解:(2x²-3x+1)²-22x²+33x-1
(x²-2x)²+2x²-4x+1
计算:(1).(-2xy²)*(3x²y)²
计算:[(x²-2x+1)/(x²-1)]÷[(x-1)(x²+x)]-x
(x²-5x+6分之x²-3x+2)²/(x²-2x-3分之x-1)²
先化简再求值x²-x/(x+1)×x²-1/(x²-2x+1)
多项式(2mx²-x²+3x+1)-(15x²-4x²+3x)不含X²