Answer:
A= (0,0) and B = (6,3)
We can find the length AB with the following formula:

And replacing we got:

So then the length AB would be

Explanation:
For this case we have the following two points:
A= (0,0) and B = (6,3)
We can find the length AB with the following formula:

And replacing we got:

So then the length AB would be
