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Mathematics 13 Online
OpenStudy (anonymous):

3 radical 5

OpenStudy (mertsj):

\[3\sqrt{5}\]

OpenStudy (anonymous):

Yes but what is it squared

OpenStudy (mertsj):

Well, what is 3 squared?

OpenStudy (anonymous):

9

OpenStudy (mertsj):

and what is this: \[\sqrt{5}\sqrt{5}\]

OpenStudy (anonymous):

5

OpenStudy (mertsj):

And what is 9 x 5?

OpenStudy (anonymous):

45

OpenStudy (mertsj):

Well then \[(3\sqrt{5})^2=3^2(\sqrt{5})^2=9(5)=45\]

OpenStudy (anonymous):

So let's say 3 rad 5 was the radius 45 would be the diameter

OpenStudy (mertsj):

To find the diameter, you should multiply the radius by 2 NOT square it

OpenStudy (mertsj):

\[2\times 3\sqrt{5}=(2\times3)\sqrt{5}=6\sqrt{5}\]

OpenStudy (anonymous):

Oh okay that makes more sense thanks so so much

OpenStudy (anonymous):

Oh I actually have one more question

OpenStudy (mertsj):

What is it?

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