2x-4分之x-3除以x-2分之5

x≠-2,-3,-4

分母和除数不等于0‘x+2≠0x+4≠0且(x+3)/(x+4)≠0所以x≠-2且x≠-3且x≠-4

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

①3除以x分之2=3*x/2=3x/2②x分之3除以x^2分之6=3/x*x^2/6=x/2③x分之2x+1除以5分之6+12x=(2x+1)/x*5/(6+12x)=5/6x④x^2+3x+2分之x

原式=[√(x/4)-2x√(1/x)]÷3√x=√(x/4)÷3√x-2x√(1/x)÷3√x=(1÷3)×√(x/4÷x)-(2x÷3)×√(1/x÷x)=1/3×√(1/4)-(2x/3)×√(

把平方代入根号除以根号得出｛3根号X-2根号X｝除以3根号X=根号X除以3根号X=3分之1

x^2-x-6分解因式得(x+2)(x-3)x^2-4分解因式得(x-2)(x+2)故(x^2-x-6分之x^2-4+x-3分之x+2)=(x-2)/(x-3)+(x+2)/(x-3)=2x/(x-3

原式=[(1-1分之x+5)-(1-1分之x+4))+(1-1分之x+3)-(1-1分之x+2)]*[(x+3)(x+5)]\(x^2+7x+13)=[(1分之x+2)-(1分之x+3)+(1分之x+

x平方-4x+4分之2x-6除以(x+3)=(2x-6)/(x²-4x+4)÷(x+3)=2(x-3)/(x-2)²×1/(x+3)=2(x-3)/(x+3)(x-2)²

[(x+3)/(x-3)]/[(x+2)/(x-4)]=[(x+3)(x+2)]/[(x-3)(x-4)](x-3)(x-4)≠0即x≠3且x≠4

16/15÷(3/5+1/3)=16/15÷(9/15+5/15)=16/15÷(14/15)=8/7=1又7分之1；3x=1/4x=1/125x/14=5/9x=(5/9)÷(5/14)x=(5/9

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（x-3）/（2x+4）÷(5-x-2)/（x-2)=(x-3)/[2(x+2)]×(x-2)/(3-x)=(x-3)/[2(x+2)]×-(x-2)/-(3-x)=1/2

原式=(x-1)/(x-2)÷(x-1)²/(x+2)(x-2)=(x-1)/(x-2)*(x+2)(x-2)/(x-1)²=(x+2)/(x-1)

4-4x+x^2分之2x-6除以（x+3)乘以3-x分之x^2+x-6=2(x-3)/(x-2)²×1/(x+3)×(x+3)(x-2)/(3-x)=-2/(x-2)

您好：[(X^2-2X)分之(X+2)-(X^2-4X+4)分之(X-1)]除以x-4/x^3-2x^2=[(x+2)/x(x-2)-(x-1)/(x-2)²]*x²(x-2)/(

2x-4分之3-x除以[x+2-x-2分之5]=(3-x)/(2x-4)÷[(x+2)-5/(x-2)]=(3-x)/2(x-2)÷(x²-4-5)/(x-2)=(3-x)/(x²

原式=(x^2-8x+16)^3(x+1)^6/(x^2-2x+1)^3(x-4)^4(x+2)^2=(x-4)^6(x+1)^6/(x-1)^6(x-4)^4(x+2)^2=(x-4)^2(x+1)

（x2-4x+x2/4-4+x+(2-x)/2）/（x/x-2）=(5/4x2-3x-4+(2-x)/2）/（x/x-2）=1/4(5x2-12x-16+4-2x)/（x/x-2)=（5x2-14x-

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