回复：algebra 2 question!!

来源: 于 2010-05-24 08:22:39 [旧帖] [给我悄悄话] 本文已被阅读：次

28=2*2*7,If b=2m-1,or b=7n-1,the fraction can be simplified.Since (b,b+1)=1,if b is not 2m-1,or 7n-1,the fraction can not be simplified.