√a+√b=√3+√2 (1) √ab=√6+√2 (2) （2）两边平方得：ab=8+4√3 (1)两边平方得：a+b+2√ab=5+2√6 (3) (2) 两边×2得：2√ab=2√6+2√2 (4) (4)-(5)得：a+b=5-2√2 答：a+b=5-2√2 ab=8+4√3