Question

3radical2 + 5radical8= ?

Answer 1

\[3\sqrt{2}+5\sqrt{8}\]
One way I can see this is that, convert radical 2 and 8 into decimal, then multiply:
4.24+14.14
18.38

Answer 2

Can you simplify 5radical8 to something with some number * radical 2?

Answer 3

does it help to know that
\[\sqrt{8}=\sqrt{4\times 2}=\sqrt{4}\times \sqrt{2}=2\sqrt{2}\]?

Answer 4

so you have
\[3\sqrt{2}+10\sqrt{2}\] now combine like terms

Answer 5

yes it does thanks