How to divide square roots - ACT Math
Card 0 of 5
What is 
divided by 
?
What is
Upon dividing by 
, the 
in the numerator cancels out, and the only number remaining is 
:
Upon dividing by
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Simplify 
Simplify
Find the greatest factor that is a perfect square for 112 and 63. For 112, the factors are 16 and 7, thus 
. For 63, the factors are 9 and 7, thus 
. Simplifying these terms will give 
. Cancel out the 
results in 
.
Find the greatest factor that is a perfect square for 112 and 63. For 112, the factors are 16 and 7, thus
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Simplify the following expression:
Simplify the following expression:
Although it may seem as though we cannot do anything to this expression due to our numerator and denominator having different indices, there is in fact some real simplifying to be done here.
To begin, our numerator can be evaluated, because 343 is in fact a perfect cube:
This fact helps us out with our denominator as well. Our original equation becomes the following:
Then, we can pull out two of the sevens on the bottom and cancel them like so:
We may seem to be done, but if you look, you will not see our solution among the answer choices. That is because we need to rationalize the denominator. We should never have a square root in our denominator. To remedy this, we do a fairly simple move that won't change the value of our fraction, but just the form it is in:
Now we'll have no issue finding our answer choice!
Although it may seem as though we cannot do anything to this expression due to our numerator and denominator having different indices, there is in fact some real simplifying to be done here.
To begin, our numerator can be evaluated, because 343 is in fact a perfect cube:
This fact helps us out with our denominator as well. Our original equation becomes the following:
Then, we can pull out two of the sevens on the bottom and cancel them like so:
We may seem to be done, but if you look, you will not see our solution among the answer choices. That is because we need to rationalize the denominator. We should never have a square root in our denominator. To remedy this, we do a fairly simple move that won't change the value of our fraction, but just the form it is in:
Now we'll have no issue finding our answer choice!
Compare your answer with the correct one above
Simplify:
Simplify:
Division of square roots is easy, since you can combine the roots and treat it like any other fraction. Thus, you can convert our fraction as follows:
Next, you begin to reduce the fraction:
This reduces to:
Now, break this apart again into:
, which is 
Division of square roots is easy, since you can combine the roots and treat it like any other fraction. Thus, you can convert our fraction as follows:
Next, you begin to reduce the fraction:
This reduces to:
Now, break this apart again into:
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Simplify:
Simplify:
Division of square roots is easy, since you can combine the roots and treat it like any other fraction. Thus, you can convert our fraction as follows:
Next, you begin to reduce the fraction:
This reduces to:
Now, break this apart again into:
, which is 
Finish by rationalizing the denominator:
Division of square roots is easy, since you can combine the roots and treat it like any other fraction. Thus, you can convert our fraction as follows:
Next, you begin to reduce the fraction:
This reduces to:
Now, break this apart again into:
Finish by rationalizing the denominator:
Compare your answer with the correct one above