(9a平方+6a+1)/(9a平方-1)化简
问题描述:
(9a平方+6a+1)/(9a平方-1)化简
答
(9a平方+6a+1)/(9a平方-1)
=(3a+1)²/(3a+1)(3a-1)
=(3a+1)/(3a-1)