来自唐传林的问题
化简(x方-2x分之x+2+x方-4x+4分之1-x)除以x分之x-4
化简(x方-2x分之x+2+x方-4x+4分之1-x)除以x分之x-4
1回答
2020-09-24 21:21
化简(x方-2x分之x+2+x方-4x+4分之1-x)除以x分之x-4
化简(x方-2x分之x+2+x方-4x+4分之1-x)除以x分之x-4
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-2)²]×x/(x-4)
=1/(x-2)²