先化简x方-2x分之2方-4x 4除以-搜答案-搜搜做题作业网

(x+1)/x²-2x²/(x+1)=1设(x+1)/x²=t,则方程变为：t-2/t=1,即：t²-t-2=0,即(t-2)(t+1)=0∴t1=2t2=-1

原式=[3x/(x--2)--x/(x+2)]*[(x^2--4)/x]=[3x(x+2)--x(x--2)]/(x^2--4)*[(x^2--4)/x]=(3x^2+6x--x^2+2x)/x=(2

∵y/x=3∴y=3x∴原式=(3x²-12x²+18x²)/（6x²-3x*3x+7*9x²)=9x²/(60x²)=3/20

∵y分之x=5∴x=5y(4x²-5xy-6y²)分之(x²-2xy+3y²)=(100y²-25y²-6y²)分之(25y

化简结果：-X的3次方分之一乘以（5X方-4分之1乘以X+2分之1）

题目表达不清楚

2-x分之x-x方+4x+4分之4-x方=2-x/x-x²+4x+4/4-x²=2-1-x²+4x+1-x²=2+4x-2x²

x(x-1)(x-2)³(x+1)(x-1)(x-1)(x²+x+1)/[(3-4x)(x²+x+2)]>0x(x-1)³(x-2)³(x+1)(x&

（x^2+2x+1）/(x^2-3x-4)=(x+1)^2/(x+1)(x-4)=(x+1)/(x-4)

把每个式子因式分解x的方+5x+4=（x+1）(x+4)x方-5x+6=(x-2)(x-3)………………

2X-X分之1-2X方-1分之4X=32X-(1/X)-[4X/(2X^2-1)]=3[(2X^2-1)/X]-[4X/(2X^2-1)]=3设K=2X^2-1)/X,则K-4/K=3K^2-3K-4

=(x-4)/(x+1)(x-1)除以(x-4)(x+1)/(x+1)平方+1/(x-1)=(x-4)/(x+1)(x-1)乘以(x+1)平方/(x-4)(x+1)+1/(x-1)=(x-4)/(x+

(x-1)/(x^2+3x+2)+6/(2+x-x^2)-(10-x)/(4-x^2)=(x-1)/(x+1)(x+2)-6/(x+1)(x-2)-(x-10)/(x+2)(x-2)=[(x-1)(x

x/(x²+2x+1),(x-1)/(x²+x),1/(x²-1)式1：x/(x+1)²,式2：(x-1)/[x(x+1)],式3：1/[(x+1)(x-1)]

(4x^2-y^2)/(-2x-y)=(2x+y)(2x-y)/-(2x+y)=-(2x-y)=y-2x

原式=[(x+2)/x(x-2)-(x-1)/(x-2)²]×x/(x-4)=[(x²-4-x²+x)/x(x-2)²]×x/(x-4)=[(x-4)/x(x-

=(x+2)/(x²-4)+(x-2)/(x²-4)+(x平方+4)分之2x+(x四次方+16)分之4x三次方=2x/(x²-4)+(x平方+4)分之2x+(x四次方+1

17x的9次方,上式为2x的9次方-64x的9次方+81x的9次方

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