The distance between any two points (x1 , y1) and (x2 , y2) is given as sqrt ((x1 - x2)^2 + (y1 - y2)^2)

Here the points are ( 2x+3, 8) and (2x, 4)

The distance between the two is

sqrt [(2x + 3 - 2x)^2 + (8 - 4)^2]

=> sqrt [3^2 + 4^2]

=> sqrt( 9 + 16)

=> sqrt 25

=> 5

**The distance between the points is 5**