Question

(根号2减1)(根号2+1)^-1(根号2减根号3)^2 求运算过程

(根号2减1)(根号2+1)^-1(根号2减根号3)^-2 后面是负2

Answer 1

(根号2减1)(根号2+1)^-1(根号2减根号3)^-2

=(根号2-1)^2(根号2减根号3)^-2
=(3-2根号2)(5-2根号6)
=15-6根号6-10根号2+4根号3

追问

不对劲啊~~~后面是8倍根号3吧

追答

(根号2减1)(根号2+1)^-1(根号2减根号3)^-2
=(根号2-1)^2(根号2减根号3)^-2

=(3-2根号2)(5-2根号6)
=15-6根号6-10根号2+8根号3

是啊，马虎了