Question

这些题怎么写，在线等谢谢了！

Answer 1

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帮忙看下这道题吧

追答

3

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过程说下谢谢了

追答

Answer 2

5)
√32-5√(1/2)+√(1/8)
=4√2-(5/2)*√2+(1/4)*√2
=4√2-√2
=3√2
6)
3√6*(1/2*√2/3)/(√2/2)
=3√6*(1/6*√6)/(√2/2)
=3/(√2/2)
=3*(2/√2)
=3√2
7)
(√2-√3)(2√2+2√3)
=(√2-√3)*2(√2+√3)
=2(√2-√3)*(√2+√3)
=2(2-3)
=-2
8)
(2√7-5√2)^2*(5√2+2√7)^2
=[(2√7-5√2)(5√2+2√7)]^2
=[(2√7)^2-(5√2)^2]^2
=(28-50)^2
=22^2
=484
9)
√80*√5-√50*√2
=√400-√100
=20-10
=10
10)
√2(√2+√8-√6)
=√2*√2+√2*√8-√2*√6
=√4+√16-√12
=2+4-2√3
=6-2√3
11)
(√2+√3)(√2-√3)+2√2
=(√2)^2-(√3)^2+2√2
=2-3+2√2
=2√2 -1
12)
[9√45/(3√(1/5)]*(3/2*√(8/3)
=[3√45/(1/5*√5]*(3/2*√(8/3)
=[15√45/√5]*(3/2*√(8/3)
=[15√9]*(3/2)*(2/3)*√6
=15*3√6
=45√6

Answer 3

这是基础中的基础，最好自己完成

Answer 4

第一个题目是加什么？题目看不清

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这些