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August 21, 2014

August 21, 2014

Posted by **-Untamed-** on Wednesday, September 28, 2011 at 10:25pm.

How do you get 12-30?

I keep getting a way different answer:\ Btw not sure if the radicals will show up.

- Calculus - If you can -
**-Untamed-**, Wednesday, September 28, 2011 at 10:26pmIf its possible, could you please do this on paint or something for me, and upload it so I can see how exactly you solved this, because explaining over Jiskha, will probably be hard for me to understand as I will not be able to visualize certain steps.

- Calculus -
**Reiny**, Thursday, September 29, 2011 at 12:18am√6(2√6 - √5)

To multiply two radicals, just keep the radical sign and then multiply the two numbers inside.

e.g. √5 x √7 = √35

and then of course √6 x √6 = √36 = 6

when you multiply a square root by itself, you get that number

√13 x √13 = 13

so back to our question, let's just expand it

= 2√36 - √30

= 2(6) - √30

= 12 - √30

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