A - b, a(2, 4) b(-3, 7)

To find the expression a - b and the resulting coordinates, we subtract the corresponding coordinates of b from a.

Given: a = (2, 4) b = (-3, 7)

To find a - b, we subtract the x coordinates and the y coordinates separately:

To subtract the x coordinates: 2 - (-3) = 2 + 3 = 5 To subtract the y coordinates: 4 - 7 = -3

Therefore, a - b = (5, -3)