-(x+1)²+9(x-2)²
化简{x²-2x分之x+2-x²-4x+4x分之x-1}除以X分之(x-1)(X-4)乘以(2-x)
[(x+2)/(x²+2x)-(x-1)/(x²-4x+4)]÷(x-4)/x
不等式|(x+3)/x|>(x+3)/x,不等式(x²-9)/(x-2)>0
9x+6x²-3(x-2/3x²),其中x=-2 1/4(-4x²+2x-8)-(1/2x
(1) (x²-9分之x+3 + 6+x-x²分之x)乘4x-6分之3-x (2)解答题:已知2x-
计算:(1+1/x)·x²-2x+1/x²-1;(x²/x-1-2x/1-x)÷x/x-1
先化简再求值(x-1/x-x-2/x+1)/(2x²-x/x²+2x+1)且x²-x-1
(x-x²-1/1-x)·x²-2x+1/x²-x+1
(3x/x-1-x/x+1)×x²-1/x 其中x=根号2-2 先化简
计算(x²+4x-12/x²+x+1)(x²-1/x²-4x+4)(2-x/x&
已知X不等于0,且M=(X²+2X+1)(X-2X+1),N=(X²+X+1)(x²-X+
化简分式【(x/x-1)-(x/x²-1)】÷(x²-x/x²-2x+1),并从-1≤x≤