7\9 * 9\5A - 7\9 * 27\10 + 1.2 - 1.8A = 1.4A - 1.8A - 2.1 + 1.2 = - 0.4A - 0.9
при А = - 1 7\8 = - 15\8
- 2\5 * (-15\8) - 0.9 = 3\4 - 9\10 = (15 - 18)\20 = - 3\20
7\9 * 9\5A - 7\9 * 27\10 + 1.2 - 1.8A = 1.4A - 1.8A - 2.1 + 1.2 = - 0.4A - 0.9
при А = - 1 7\8 = - 15\8
- 2\5 * (-15\8) - 0.9 = 3\4 - 9\10 = (15 - 18)\20 = - 3\20