"Simple Surd"

**NeF** · July 9th 2006, 11:54 AM

REally its so simple its difficult

--> Without a calculator simplify $\sqrt18 . \sqrt24$

I get as far as $\sqrt3\sqrt6 . \sqrt4\sqrt6$
$\sqrt3\sqrt6 . 2\sqrt6$

the book says the ans is $24\sqrt3$
But i have no clue how to achive that answer

**CaptainBlack** · July 9th 2006, 12:09 PM

Originally Posted by NeF

REally its so simple its difficult

--> Without a calculator simplify $\sqrt18 . \sqrt24$

I get as far as $\sqrt3\sqrt6 . \sqrt4\sqrt6$
$\sqrt3\sqrt6 . 2\sqrt6$

the book says the ans is $24\sqrt3$
But i have no clue how to achive that answer

Since $\sqrt{18} . \sqrt{24} \ne 24\sqrt{3}$ either the book is wrong
or you have copied the question incorrectly.

$<br /> \sqrt{18} . \sqrt{24}=\sqrt{2.3.3}.\sqrt{2.2.2.3}=\sqrt{2.2.2. 2.3.3.3}=4.3.\sqrt{3}=12\sqrt{3}<br />$

RonL

**NeF** · July 9th 2006, 12:27 PM

Hey man thanks alot. The book is wrong x/

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