M is the midpoint of XZ. For each pair of points given, find the coordinates of the third point 1) X(2,8), M(-2, 2)

Answer 1

xM = (xX + xZ) / 2

xZ = (2 * xM) - xX = (2 * -2) - 2

find yZ the same way

Answer 2

It don't make no sense o-o