The first thing you should know is that to find the vector, PQ we must subtract both points: PQ = Q-P = (4, 14) - (2, 9) = (2, 5) The module of this vector is given by lPQl = root ((2) ^ 2 + (5) ^ 2) lPQl = root (29) answer PQ = (2, 5) lPQl = root (29) a. <2, 5>, square root of 29