(1)X-1)(1-2x)>0(2)6x²+5x<4(3)-3x²+x+1>0(4)x²-
先化简再求值(3x+4/x²-1-2/x-1)*x-2/x²-2x+1,其中x是不等式组{x+4>0
计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
(x+2)(x-3)>(-x-3)² -1 (2x-5)(2x+5)<(x-3)(4x+7)
(x+4)(3x+6)=2x+4 (3x- 1)²+4x²=0 x²+5=2根号6x-1
(x-2)²=(2x-3)² x²-4x=0 3x(x+1)=3x+3 x²-2
x²+3x-1=0,1/(x-2)×(x²-4x+4)/(x+1)-(x-1)/(x+2)
解方程①(x+3/x-1)²-5(x+3/x-1)+6=0 ②x²-2/x+3-6x+18/x
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)
1,设x>0,求(2x²+5x+3)/x的最小值
[(x+2)/(x²+2x)-(x-1)/(x²-4x+4)]÷(x-4)/x
(x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3