化简(b+ab)分之(a方-1)
问题描述:
化简(b+ab)分之(a方-1)
答
(a^2-1)/(b+ab)
=(a+1)(a-1)/(b+ab)
=(a+1)(a-1)]/[b(1+a)]
=(a-1)/b
=(a/b)-(1/b)