5x(x²-2x+4)-x²(x-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
(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
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
计算(x²+4x-12/x²+x+1)(x²-1/x²-4x+4)(2-x/x&
(1)(1/x三次-1/x平方)*x平方/x-1 (2)(x/2-x )- (4-x²/x²+4x+
先化简再求值:(x+2/x²-2x - x-1/x²-4x+4)÷ x-4/x,其中x=3/2
先化简,再求值:[(x-2/x²+2x)-(x-1/x²+4x+4)]÷﹙x-4/x+2﹚,其中x&
2道分式计算[(x+4)(x-2)]/x³+2x²+x÷[(x-2)/x·(x+4)/(x+1)]2
x(3x² -5x+1)-3x² (x-2)
计算:(1)x²/x-2 - 4x/x-2 + 4/x-2;