Answer:
Step-by-step explanation:
<h3>We have:</h3>
Now, we need to transform each sub-radical number in another pair of numbers that allow us to simplify each radical into a common radical.
So, we know that 20=4(5), and 125=25(5).
<h3>Replacing these in the expression:</h3>
; but 4 and 25 have squared roots.
<h3>Then:</h3>
Now, we can operate these terms, because they are like terms, that is, they have the same root. Therefore, the simplest radical form is: