SOLUTION: I don't understand how to do radicals with numbers, like 8 square rooted by 3 is 2. My problem is to simplify this: sqrt (81x^2) with the little radical number being 3. if that mak

Algebra ->  Exponential-and-logarithmic-functions -> SOLUTION: I don't understand how to do radicals with numbers, like 8 square rooted by 3 is 2. My problem is to simplify this: sqrt (81x^2) with the little radical number being 3. if that mak      Log On


   



Question 702147: I don't understand how to do radicals with numbers, like 8 square rooted by 3 is 2. My problem is to simplify this: sqrt (81x^2) with the little radical number being 3. if that makes sense.
Answer by KMST(5328) About Me  (Show Source):
You can put this solution on YOUR website!
Inside a cubic root, factor out anything that is a cube.
Then split the root into a product of the roots of the factors,
and then simplify that part that can be simplified.
root%283%2C8%29=root%283%2C2%5E3%29=2