1/4(-4x²+2x-8)-(1/2x-1)
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
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
3X+(X+2)+(X+1)*(X-1)=4*(X²+8)
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
(x-1)^3(x+1)(x-2)/(x+4)
(x+1)(x+2)(x+3)(x+4)+1
9x+6x²-3(x-2/3x²),其中x=-2 1/4(-4x²+2x-8)-(1/2x
先化简再求值:(x²-4x+4分之x+8-2-x分之1)÷x²-2x分之x+3 x²-4=
(x+2/x+1)-(x+4/x+3)-(x+3/x+2)+(x+5/x+4)
计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1
计算(x²+4x-12/x²+x+1)(x²-1/x²-4x+4)(2-x/x&