РОЗДІЛ 4. Квадратні рівняння » 792 (8)
8) –7 і –3/14. –7 + (–3/14) = –73/14; b = 73/14. –7 • (–3/14) = 3/2 = 11/2; c = 11/2. x2 + 73/14x + 11/2 = 0; x2 + 101/14x + 3/2 = 0 | • 14; 14x2 + 101x + 21 = 0.
8) –7 і –3/14. –7 + (–3/14) = –73/14; b = 73/14. –7 • (–3/14) = 3/2 = 11/2; c = 11/2. x2 + 73/14x + 11/2 = 0; x2 + 101/14x + 3/2 = 0 | • 14; 14x2 + 101x + 21 = 0.