2(x²+6x+1)²+5(x²+1)(x²+6x+1)+2(x²+1
2(x²-1²)
(x²-5x+6分之x²-3x+2)²/(x²-2x-3分之x-1)²
化简~(x²+3x+9/x²-27)+(6x/9x-x²)-(x-1/6+2x)
1-x²+2xy-y²
计算:(1).(-2xy²)*(3x²y)²
1/X²+3X+2 +1/X²+5X+6 +1/X²+7X+12 +1/X²+9
(x-1)(x²+mx+n)=x²-6x²+11x-6
7/x²+x+3/x²-x=6/x²-1
(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