Решите данное уравнение.
- x² + 6x - 8 = 0
d = b² - 4ac = 6² - 4 × ( -1 ) × ( -8 ) = 36 - 32 = 4
√d = √4 = 2
x₁ = ( -b + √d ) / 2a = ( -6 + 2 ) / -2 = -4 / -2 = 2
x₂ = ( -b - √d ) / 2a = ( -6 - 2 ) / -2 = -8 / -2 = 4
Оцени ответ
Вход
Регистрация
Задать вопрос
- x² + 6x - 8 = 0
d = b² - 4ac = 6² - 4 × ( -1 ) × ( -8 ) = 36 - 32 = 4
√d = √4 = 2
x₁ = ( -b + √d ) / 2a = ( -6 + 2 ) / -2 = -4 / -2 = 2
x₂ = ( -b - √d ) / 2a = ( -6 - 2 ) / -2 = -8 / -2 = 4