(x-(x+1分之2x))除以x^2-1分之x^2-2x+1

分类: 作业答案 • 2021-12-31 11:41:47

问题描述：

答

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