计算 2(x²-x+1)-(-2x+3x²)+(1-x)
计算 2(x²-x+1)-(-2x+3x²)+(1-x)
计算:[(x²-2x+1)/(x²-1)]÷[(x-1)(x²+x)]-x
计算:3x²-[5x-(1/2x-3)+2x²]
计算:(1).(-2xy²)*(3x²y)²
(x²-5x+6分之x²-3x+2)²/(x²-2x-3分之x-1)²
计算:5x²-[3x-(4x-3x)-2x²]
计算题:3x(x²-3x+2)-x²(3x-1)
(1)(x²-2x)²+2(x²-2x)+1
(x²-2x)²+2x²-4x+1
1.(3x²+2x-8)²-(x²-2x-8)²
计算:(2x+y-1)²
4x²-[2x-(x²-2x+3)-2(x²-3x)] 计算