Homework Help: Algebra

Posted by Marysvoice on Sunday, February 3, 2008 at 10:30am.

multiplying sq rts

sqrt18a^7b times sqrt27a^8b^6

I think I need to collect like terms such as the a's and b's. My big problem is order of operations. Every problem I do looks so different.

Algebra - Jake1214, Sunday, February 3, 2008 at 10:56am
18 = 9 * 2 then sqrt 18 = 3sqrt2
sqrt a^7 = a^3 * sqrt a

27 = 9 * 3 then sqrt 27 = 3 sqrt3
sqrt a^8 = a^4
sqrt b^6 = b^3

Now just multiply the like-terms together.
Algebra - Marysvoice, Sunday, February 3, 2008 at 2:20pm
3sqrt6 and sqrt2a^4
Algebra - Jake1214, Sunday, February 3, 2008 at 2:26pm
... 3sqrt6 and sqrt2a^4?

So you simplified the problem first as I said above and you get:

3(a^3)sqrt(2a) * 3(a^4)(b^3)sqrt(3)

and then you multiply those 2 things together and you get:

9(a^7)(b^3)sqrt(6a)

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