а) 2x^2 + 6x - 4 = 0Дискриминант D = 6^2 - 42(-4) = 36 + 32 = 68x1,2 = (-6 ± √68) / (2*2) = (-6 ± 2√17) / 4Ответ: x1 = (-6 + 2√17) / 4, x2 = (-6 - 2√17) / 4
б) 4x^2 - 100 = 04x^2 = 100x^2 = 25x1,2 = ±5Ответ: x1 = 5, x2 = -5
в) 6x^2 + 5x = 0x(6x + 5) = 0x1 = 0, x2 = -5/6Ответ: x1 = 0, x2 = -5/6
г) 8x^2 - x + 1 = 0Дискриминант D = (-1)^2 - 481 = 1 - 32 = -31x1,2 = (1 ± √(-31)) / (28) = (1 ± √31i) / 16Ответ: x1 = (1 + √31i) / 16, x2 = (1 - √31i) / 16
а) 2x^2 + 6x - 4 = 0
Дискриминант D = 6^2 - 42(-4) = 36 + 32 = 68
x1,2 = (-6 ± √68) / (2*2) = (-6 ± 2√17) / 4
Ответ: x1 = (-6 + 2√17) / 4, x2 = (-6 - 2√17) / 4
б) 4x^2 - 100 = 0
4x^2 = 100
x^2 = 25
x1,2 = ±5
Ответ: x1 = 5, x2 = -5
в) 6x^2 + 5x = 0
x(6x + 5) = 0
x1 = 0, x2 = -5/6
Ответ: x1 = 0, x2 = -5/6
г) 8x^2 - x + 1 = 0
Дискриминант D = (-1)^2 - 481 = 1 - 32 = -31
x1,2 = (1 ± √(-31)) / (28) = (1 ± √31i) / 16
Ответ: x1 = (1 + √31i) / 16, x2 = (1 - √31i) / 16