Ответ:
(3x-2)(3x+2)-(2x+1)2 = 9х^2-4х-2
2 ± √29 / 9
Пошаговое объяснение:
9x^2 - 4 - 4x - 1
9x^2 - 5 - 4x
9x^2 - 4x - 5
D = b^2 - 4ac = 16 - (-100) = 116
√D = 2√29
x1 = -b - √D / 2a = 4 - 2√29 / 18 = 2 - √29 / 9
x2 = 2 + √29 / 9
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Ответ:
(3x-2)(3x+2)-(2x+1)2 = 9х^2-4х-2
Ответ:
2 ± √29 / 9
Пошаговое объяснение:
9x^2 - 4 - 4x - 1
9x^2 - 5 - 4x
9x^2 - 4x - 5
D = b^2 - 4ac = 16 - (-100) = 116
√D = 2√29
x1 = -b - √D / 2a = 4 - 2√29 / 18 = 2 - √29 / 9
x2 = 2 + √29 / 9