化简:x^2\/x-2+4x\/2-x+4\/x-2
x^2\/x-2+4x\/2-x+4\/x-2 =(x²-4x+4)\/(x-2)=(x-2)²\/(x-2)=x-2;
化简(x^2-4\/x^2-4x+4+2-x\/x+2)\/x\/x-2,其结果是()A、-8\/x-2 B、8\/x...
原式=[(x+2)\/(x-2)-(x-2)\/(x+2)]*(x-2)\/x =[8x\/(x-2)(x+2)]*(x-2)\/x =8\/(x+2)选D 祝你开心!希望能帮到你,如果不懂,请追问,祝学习进步!O(∩_∩)O
化简:1. x²\/(x-2)-4x\/(x-2)+4\/x-2 解方程:1. x\/(x-1)-2\/x=1
=(x²-4x+4)\/(x-2)=(x-2)(x+2)\/(x-2)=(x+2)2.解方程:x\/(x-1)-2\/x=1 通分得:x²-2(x-1)=x(x-1)展开得:x²-2x+2=x²-x 化简得:x=2 经检验,x=2为原方程的解。3.(a+(1)\/a-2)÷(a²+a-2)\/(a²-4)=[(a&...
化简(x的平方-4\/x的平方-4x+4 +2-X\/x+2)除以x\/x-2,其结果是?
解:原式=[(x+2)\/(x-2)-1]÷x\/(x-2)=4\/(x-2)×(x-2)\/x=4\/x
化简(x^2-4\\x^2-4x+4+2-x\\x+2)。其中x=-3
原式=(x+2)(x-2)\/(x-2)^2-(x-2)\/(x+2)=(x+2)\/(x-2)-(x-2)\/(x+2)=[(x+2)^2-(x-2)^2]\/(x+2)(x-2)=(x+2+x-2)(x+2-x+2)\/(x+2)(x-2)=4x\/(x+2)(x-2)=-12\/[(-1)×(-5)]=-12\/5
化简x2-2x分之x2-4x+4÷(x-x分之4),从-根号5<x<根号5范围内选取一个合适...
原式=x(x-2)^2\/[x(x-2)((x^2-4)]=1\/(x+2)由原式得到其定义域x≠0,2,-2 (分母不等于0,即x^2-2x≠0;x≠0;x-4\/x≠0)又因为-根号5<x<根号5,所以x只可以取±1 x=1时 ,原式=1\/3 x=-1时 ,原式=1 ...
先化简(x平方+2x分之x-2 - x平方+4x+4分之x-1)÷x+2分之x-4,然后为x...
[(x-2)\/(x^2+2x)-(x-1)\/(x^2+4x+4)]÷(x-4)\/(x+2)=[(x-2)\/x(x+2)-(x-1)\/(x+2)^2]*(x+2)\/(x-4)=(x-2)\/x(x-4)-(x-1)\/(x+2)(x-4)=(x-2)(x-4)\/x(x+2)(x-4)-x(x-1)\/x(x+2)(x-4)=(x^2-6x+8-x^2+x)\/x(x+2)(x-4)=(...
先化简再求值x的平方减2x分之x的平方减4x加4
(x²-4x+4)\/(x²-2x)=(x-2)²\/x(x-2)=(x-2)\/x.以相应的x值代入上式即OK了。
x^2-4x+4\/x-2【化简】
1\/(4x-2x²)=1\/[2x(2-x)]=-1\/[2x(x-2)]1\/(x²-4)=1\/[(x+2)(x-2)]-1\/[2x(x-2)]与1\/[(x+2)(x-2)]的最简公分母是 2x(x+2)(x-2)
(x-2分之x-x+2分之x)÷2-x分之4x分式化简该怎么做
(x-2分之x-x+2分之x)÷2-x分之4x =[(x\/(x-2)-x\/(x+2)]÷4x\/(2-x)=[(x²+2x-x²+2x)\/(x-2)(x+2)]*(2-x)\/4x =4x\/(x-2)(x+2)*(2x-)\/4x =-1\/(x+2)