1/x2-4x-1/4-16x

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1/x2-4x-1/4-16x
(x2+4x)/(x-1)

(x2+4x)/(x-1)(x2+4x)/(x-1)(x2+4x)/(x-1)(x²+4x)/(x-1)≤0x(x-1)(x+4)≤0(其中x≠1)使用序轴标根法,得:x≤-4或0≤x

约分 1-x2/x2-3x-4

约分1-x2/x2-3x-4约分1-x2/x2-3x-4约分1-x2/x2-3x-41-x2=(1-x)(1+x)x2-3x-4=(x+1)(x-4)共同约去(x+1)即可

(1-x2)(x2-4x+5)

(1-x2)(x2-4x+5)(1-x2)(x2-4x+5)(1-x2)(x2-4x+5)因为(x2-4x+5)是永远大于零的,它的b2-4ac

不等式(x2-4x-5)(x2+1)

不等式(x2-4x-5)(x2+1)不等式(x2-4x-5)(x2+1)不等式(x2-4x-5)(x2+1)因为x2+1>0所以x2-4x-5(x2-4x-5)(x2+1)(x-5)(x+1)(x^2

:(x2-16)/(x2+8x+16)+x/(x-4)除以1/x2-16,其中x=根号2+2

:(x2-16)/(x2+8x+16)+x/(x-4)除以1/x2-16,其中x=根号2+2:(x2-16)/(x2+8x+16)+x/(x-4)除以1/x2-16,其中x=根号2+2:(x2-16)

通分 3x/x2-2x,2x+1/4-x2,3/2x2+4x

通分3x/x2-2x,2x+1/4-x2,3/2x2+4x通分3x/x2-2x,2x+1/4-x2,3/2x2+4x通分3x/x2-2x,2x+1/4-x2,3/2x2+4x3x/(x^2-2x)=3

问几个分式化简的问题:a2-ab/b2-ab x2+x/x2-1 x2+4x/x2+8x+16 x2-2x/2y-xy

问几个分式化简的问题:a2-ab/b2-abx2+x/x2-1x2+4x/x2+8x+16x2-2x/2y-xy问几个分式化简的问题:a2-ab/b2-abx2+x/x2-1x2+4x/x2+8x+1

3/x2 -3x+2-1/x-2=1/x2 -x+4/x2 -2x

3/x2-3x+2-1/x-2=1/x2-x+4/x2-2x3/x2-3x+2-1/x-2=1/x2-x+4/x2-2x3/x2-3x+2-1/x-2=1/x2-x+4/x2-2x3/(x²

计算:x2-5x+6/x2-4x+3 + x2-4x+3/x2-2x+1 + x2-3x-4/1-x2

计算:x2-5x+6/x2-4x+3+x2-4x+3/x2-2x+1+x2-3x-4/1-x2计算:x2-5x+6/x2-4x+3+x2-4x+3/x2-2x+1+x2-3x-4/1-x2计算:x2-

4x2-4x+1=x2+6x+9

4x2-4x+1=x2+6x+94x2-4x+1=x2+6x+94x2-4x+1=x2+6x+91.4x²-4x+1=x²+6x+9(2x-1)²=(x+3)²

化简 √(16-8x+x2)-√(x2-2x+1)(1<x<4)

化简√(16-8x+x2)-√(x2-2x+1)(1<x<4)化简√(16-8x+x2)-√(x2-2x+1)(1<x<4)化简√(16-8x+x2)-√(x2-2x+1)(1<x<4)1<x<4√(

证明:根号(x2+2x+4)-根号(x2-x+1)

证明:根号(x2+2x+4)-根号(x2-x+1)证明:根号(x2+2x+4)-根号(x2-x+1)证明:根号(x2+2x+4)-根号(x2-x+1)要使根号(x2+2x+4)-根号(x2-x+1)则

因式分解 (x2+2x)2+2x2+4x+1

因式分解(x2+2x)2+2x2+4x+1因式分解(x2+2x)2+2x2+4x+1因式分解(x2+2x)2+2x2+4x+1(x^2+2x)^2+2x^2+4x+1=(x^2+2x)^2+2(x^2

(x+2)(x2-2x+4)+(x-1)(x2+x+1),其中x=-三分之二

(x+2)(x2-2x+4)+(x-1)(x2+x+1),其中x=-三分之二(x+2)(x2-2x+4)+(x-1)(x2+x+1),其中x=-三分之二(x+2)(x2-2x+4)+(x-1)(x2+

(x+1)(x2-x+1)+(x-2)(x2+2x+4),其中x=-3/2

(x+1)(x2-x+1)+(x-2)(x2+2x+4),其中x=-3/2(x+1)(x2-x+1)+(x-2)(x2+2x+4),其中x=-3/2(x+1)(x2-x+1)+(x-2)(x2+2x+

分解因式:4(3x2-x-1)(x2+2x-3)-(4x2+x-4)2

分解因式:4(3x2-x-1)(x2+2x-3)-(4x2+x-4)2分解因式:4(3x2-x-1)(x2+2x-3)-(4x2+x-4)2分解因式:4(3x2-x-1)(x2+2x-3)-(4x2+

x2-4x+1=0,则x+1/x=?x2+1/x2=?

x2-4x+1=0,则x+1/x=?x2+1/x2=?x2-4x+1=0,则x+1/x=?x2+1/x2=?x2-4x+1=0,则x+1/x=?x2+1/x2=?x²-4x+1=0x&sup

先化简,再求值:(4x2-3x)-2(x2+2x-1)-(x2+x-1)

先化简,再求值:(4x2-3x)-2(x2+2x-1)-(x2+x-1)先化简,再求值:(4x2-3x)-2(x2+2x-1)-(x2+x-1)先化简,再求值:(4x2-3x)-2(x2+2x-1)-

(X2-X)2+(X2+3X+2)2-4(X2+X+1)2因式分解

(X2-X)2+(X2+3X+2)2-4(X2+X+1)2因式分解(X2-X)2+(X2+3X+2)2-4(X2+X+1)2因式分解(X2-X)2+(X2+3X+2)2-4(X2+X+1)2因式分解(

解方程 (x2-8x+16) 2x --------------=------- (x2-4x+14) x-2刚刚题没发好(x2-8x+16)/ (x2-4x+14)+(1+2/(x-2))2=2x/(x-2)

解方程(x2-8x+16)2x--------------=-------(x2-4x+14)x-2刚刚题没发好(x2-8x+16)/(x2-4x+14)+(1+2/(x-2))2=2x/(x-2)解