SOLUTION: how do i simplify the expression: 2square root of 42 times square root of 9

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Question 307418: how do i simplify the expression: 2square root of 42 times square root of 9
Answer by rapaljer(4671) About Me  (Show Source):
You can put this solution on YOUR website!
2%2Asqrt%2842%29%2Asqrt%289%29

The square root of 42 does NOT simplify, since no perfect squares divide evenly into it.

The only simplification that can be done is
2%2Asqrt%2842%29%2A3
6%2Asqrt%2842%29

That's it!!

Dr. Robert J. Rapalje

P.S. I have a GREAT website with a LOT of different help with square roots. Go to "www2.seminolestate.edu/rrapalje". To see my FREE video, look for the link that says "Rapalje Videos in Living Color" and choose "Basic Algebra". Select the topic "Radicals".

For written explanation, look at the link on my Homepage called "Basic, Intermediate and College Algebra: One Step at a Time." Choose "Basic Algebra", and look at Chapter 5 on Radicals. There are a LOT of problems solved in LIVING COLOR.