All GRE Math Resources
Example Questions
Example Question #2 :How To Find The Common Factor Of Square Roots
Which of the following is equivalent to:
?
To begin with, factor out the contents of the radicals. This will make answering much easier:
They both have a common factor. This means that you could rewrite your equation like this:
This is the same as:
These have a common. Therefore, factor that out:
Example Question #1 :How To Find The Common Factor Of Square Roots
Simplify:
These three roots all have ain common; therefore, you can rewrite them:
Now, this could be rewritten:
Now, note that
Therefore, you can simplify again:
Now, that looks messy! Still, if you look carefully, you see that all of your factors have; therefore, factor that out:
This is the same as:
Example Question #31 :Arithmetic
Simplify the following:
It cannot be simplified any further
Begin by factoring each of the roots to see what can be taken out of each:
These can be rewritten as:
Notice that each of these has a common factor of. Thus, we know that we can rewrite it as:
Example Question #31 :Basic Squaring / Square Roots
Simplify the following:
The expression cannot be simplified any further.
Clearly, all three of these roots have a common factorinside of their radicals. We can start here with our simplification. Therefore, rewrite the radicals like this:
We can simplify this a bit further:
From this, we can factor out the common:
Example Question #1 :How To Find The Common Factor Of Square Roots
To attempt this problem, attempt to simplify the roots of the numerator and denominator:
Notice how both numerator and denominator have a perfect square:
Theterm can be eliminated from the numerator and denominator, leaving
Example Question #1 :Factoring Common Factors Of Squares And Square Roots
For this problem, begin by simplifying the roots. As it stands, numerator and denominator have a common factor ofin the radical:
And as it stands, thisis multiplied by a perfect square in the numerator and denominator:
Theterm can be eliminated from the top and bottom, leaving
Example Question #35 :Arithmetic
To solve this problem, try simplifying the roots by factoring terms; it may be noticeable from observation that both numerator and denominator have a factor ofin the radical:
We can see that the denominator has a perfect square; now try factoring thein the numerator:
We can see that there's a perfect square in the numerator:
Since there is ain the radical in both the numerator and denominator, we can eliminate it, leaving