x^2+x-6分之x^2+3x-x^2-4分之x+2计算

分类: 作业答案 • 2021-12-19 21:41:24

问题描述：

答

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