Ответ:
x² - 2x + = + 8
x² - 2x + - - 8 = 0
x² - 2x - 8 = 0
D = b² - 4ac = (-2)² - 4 * 1 *(-8) = 4 + 32 = 36
x = - b - / 2a = -(-2) - / 2 = 2 - 6 /2= -2
x₂ = - b + / 2a = -(-2) + / 2 = 2 + 6 / 2 = 8 / 2 = 4
Ответ: -2, 4
Пошаговое объяснение:
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Ответ:
x² - 2x + = + 8
x² - 2x + - - 8 = 0
x² - 2x - 8 = 0
D = b² - 4ac = (-2)² - 4 * 1 *(-8) = 4 + 32 = 36
x = - b - / 2a = -(-2) - / 2 = 2 - 6 /2= -2
x₂ = - b + / 2a = -(-2) + / 2 = 2 + 6 / 2 = 8 / 2 = 4
Ответ: -2, 4
Пошаговое объяснение: