1,化简 (a-b)除以(根号a-根号b)

问题描述:

1,化简 (a-b)除以(根号a-根号b)

(a-b)除以(根号a-根号b)
=(√a+√b)(√a-√b)÷(√a-√b)
=√a+√b=(√a+√b)(√a-√b)÷(√a-√b)额,这个下面,能再来个步骤么=(√a+√b)(√a-√b)÷(√a-√b)=(√a+√b)×1=√a+√b或者这样:(a-b)除以(根号a-根号b)=[(√a)²-(√b)²]÷(√a-√b)=(√a+√b)(√a-√b)÷(√a-√b)=√a+√b