n 2 (−6.284 − 2.223 ) + (7.83 − 14.3 ) r A? z6.284p2.223b= B? 7.83p14.3b= n 3 (1.118 + 3.58 ) + (−2.24 + 14.28 ) r A? 1.118+3.58b= B? z2.24+14.28b= n 3