拜托大家帮帮我(1)3次根号-8-根号9+根号2(根号2-1)+根号2分之根号8
问题描述:
拜托大家帮帮我(1)3次根号-8-根号9+根号2(根号2-1)+根号2分之根号8
(1)3次根号-8-根号9+根号2(根号2-1)+根号2分之根号8 (2)根号3分之根号8×根号6+根号2分之根号8+根号6 明天老师就要查了,可是这两个题我不会.
答
答:
(1)
3次根号-8-根号9+根号2(根号2-1)+根号2分之根号8
=³√(-8)-√9+√2(√2-1)+(√8)/√2
=-2-3+2-√2+(2√2)/√2
=-3+2
=-1
(2)
根号3分之根号8×根号6+根号2分之根号8+根号6
=(√8*√6)/√3+(√8)/√2+√6
=√8*√2+(2√2)/√2+√6
=√16+2+√6
=4+2+√6
=6+√6