Вопрос пользователя:
Решите уравнение: 2x^2 – x – 6 = 0
Илюха отвечает:
2x² – x – 6 = 0
2 * -6 = -12
-4 * 3 = -12
-4 + 3 = -1
2x² – 4x + 3x – 6 = 0
(2x² – 4x) + (3x – 6) = 0
2x(x – 2) + 3(x – 2) = 0
(2x + 3)(x – 2) = 0
2x + 3 = 0
2x = -3
x = -3/2
x – 2 = 0
x = 2
x (1)= -3/2 и x(2) = 2