It's 4. The factors of 12 are: 1,2,3,4,6,12. The factors of 20 are: 1,2,4,5,10,20.
For this case we have:
By properties of the radicals 
So:
.
Now, for power properties we have:

Thus, 
So:
in its radical form
Answer:
in its simplest form.
in its radical form
What happend ohhhhh Ok Good
Answer:
82
Step-by-step explanation:
50+32 =82 and this has to be longer so this is me making it longer