(1/x²+x)+(1/x²+3x+2)+(1/x²+5x+6)+(x²+7x+
(1/x²+x)+(1/x²+3x+2)+(1/x²+5x+6)+(x²+7x+
化简 (x+y)(x²-xy+y²) ; 3(2x-1)(x+6)-5(x-3)(x+6)
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(3x² -5x+1)-3x² (x-2)
[(x+2)/(x²+2x)-(x-1)/(x²-4x+4)]÷(x-4)/x
解方程①(x+3/x-1)²-5(x+3/x-1)+6=0 ②x²-2/x+3-6x+18/x
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
(x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3
化简 (3x/x-1 -x/x+1)÷x/x²-1
((x²-5x+6)/(12-7x+x²))²÷((x²+3x+2)/(x
(3x/x-1-x/x+1)×x²-1/x 其中x=根号2-2 先化简
解分式方程1/(x²+3x+2)+1/(x²+5x+6)+1/(x²+7x+12)1/(x