SOLUTION: simplify root symbol 39a^3b^5/root symbol 13a2b I am having difficulty with this can you help please????

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Question 623092: simplify
root symbol 39a^3b^5/root symbol 13a2b
I am having difficulty with this can you help please????

Answer by jsmallt9(3758)   (Show Source): You can put this solution on YOUR website!
I assume by "root symbol" you mean square root. (In the future, please specify which kind of root.) I also assume that "13a2b" means

There are several ways to deal with a fraction of square roots. My prefernce is to do the following:
  1. Use the property to join the two square roots into one.
  2. Reduce the fraction. (Note: If you're clever you will keep in mind step 3 and maybe not reduce the fraction as fully as possible. For example, if you had then you would not reduce the fraction because step 3 wants perfect square denominators. 4 is already a perfect square. If we reduce 2/4 to 1/2 then we would no longer have a perfect square denominator. And we would end up changing 1/2 back to 2/4 in step 3.)
  3. If there still is a denominator, then make sure it is a perfect square.
  4. If there still is a denominator, then use the property again, this time in the other direction -- to split the numerator from the denominator.
  5. Simplify any remaining square roots and fractions.
Let's see this in action:

1. Join the square roots:

2. Reduce the fraction (maybe not fully).
The entire denominator cancels out leaving:

or just

3. If there's a still denominator, ...
There is no denominator.
4. If there's a still denominator, ...
There is no denominator.
5. Simplify any remaining square roots and fractions.
To simplify a square root, look for perfect square factors of the radicand (the expression inside). There are not prefect square factors in the 3 or the a. But there are perfect square factors in . When I factor out the perfect squares I like to put those factors in front:

Then you use another property of radicals, , split the square root so that eah perfect square factor is in its own square root:

The square roots of the perfect squares simplify:

which simplifies to:

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