这两道题的答案急求

Question

如题所述

Answer 1

①2-1-1=0 ②2又根号3-2-2又根号三+2=0 ③根号三+3-根号3-1=2 ④根号三-根号2+根号五-根号三=根号2+根号5

Answer 2

(1)原式=2-1-1=0
(2)原式=2✓3-2+2-2✓3=0
(3)原式=2×✓3／2+3-✓3-1=2(4)原式=✓3-✓2+✓5-✓3=✓5-✓2