Homework Help: Calculus

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

Бу6(2Бу6 - Бу5)

How do you get 12-Бу30?

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 10:26pm
If 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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