Question

find the difference between the coordinates of the points (-2,8) and (5,8)

Answer 1

You can do this as you'd do with a normal subtraction!

You need to find the difference between 5 and -2 (x coordinates) and then the difference between 8 and 8 (y coordinates)

So,

(5,8)-(-2,8)=  (7,0)

This means that there's a difference of 7 between the x coordinates and a difference of 0 between the y coordinates!