先化简再求值x²-x/(x+1)×x²-1/(x²-2x+1)
先化简再求值x²-x/(x+1)×x²-1/(x²-2x+1)
化简求值【(x-2/x²+2x)-(x-1/x²+4x+4)】/(x-4/x+2)其中x²
2(x²-1²)
(1)(x²-2x)²+2(x²-2x)+1
(x²-2x)²+2x²-4x+1
计算:[(x²-2x+1)/(x²-1)]÷[(x-1)(x²+x)]-x
2009.成都 先化简再求值 x²(3-x)+x(x²-2x)+1其中x=根号3
(x²-5x+6分之x²-3x+2)²/(x²-2x-3分之x-1)²
计算 2(x²-x+1)-(-2x+3x²)+(1-x)
计算题:3x(x²-3x+2)-x²(3x-1)
①先化简,再求值.4(3x²y—1/2xy²)—5(—xy²+3x²y),其中x
化简再求值[(x²+y²)²-4x²y²]÷(x²-y&su