Question

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Answer 1

Start with factoring 18

Answer 2

18 = _ * _

Answer 3

What do you think it is?

Answer 4

A.

Answer 5

It's not A

Answer 6

9x2 = 18. Next take 9 out from under the root sign making it a 3 (Square root of 9=3) and place it in front of the root sign. Leave 2 under the root sign because there is nothing that you can do to simplify it any more, and that makes 2 root 3.

Answer 7

Get it?

Answer 8

You'll want to start by factoring 18 into its factors, 9 and 2:
\[\sqrt{18}=\sqrt{9*2}=\sqrt{9}\sqrt{2}\]
Notice here you can simplify the first radical