计算:a²/a-1-a-1(过程)
问题描述:
计算:a²/a-1-a-1(过程)
答
a²/(a-1)- (a-1)
=a²/(a-1) - (a-1)²/(a-1)
=(a²-a²+2a-1)/(a-1)
=(2a-1)/(a-1)