计算 x²+4x+4 / x²-4 + x/ 2-x
问题描述:
计算 x²+4x+4 / x²-4 + x/ 2-x
答
解
原式
=(x+2)²/(x-2)(x+2)-x/(x-2)
=(x+2)/(x-2)-x/(x-2)
=(x+2-x)/(x-2)
=2/(x-2)