Here's the question you clicked on:
leslie096
Using the transformation T: (x, y) (x + 2, y + 1), find the distance A'B'. https://media.glynlyon.com/g_geo_2012/10/examp1.gif
A (0,0) --> ( 2,1) = A' B(1,3) ---> ( 1+2, 3+1) = (3 ,4) = B' A'B' = sqrt( (3-2)^2 + (4-1)^2) + sqrt10
In the answer there's something over the sqrt.
This is what they want the answer to look like: