How do you calculate the square root of 20 divided by the square root of 15?

1 Answer
Jun 13, 2018

Answer:

Eliminate common factors and you will find the answer is #2/sqrt(3)#

Explanation:

First, let's write the expression:

#sqrt(20)/sqrt(15)#

Now, we factor each number down:

#sqrt(20)/sqrt(15)=(sqrt(5)sqrt(4))/(sqrt(5)sqrt(3))#

#=(2sqrt(5))/(sqrt(5)sqrt(3))#

We have a common factor of #sqrt(5)# in both the numerator and denominator, and can therefore eliminate it:

#=(2cancel(sqrt(5)))/(cancel(sqrt(5))sqrt(3))#

We now have our simplified answer:

#color(green)(2/sqrt(3)#