Ответ:
3x²-5x-2=0
D = 25 + 24 = 49
x1/x2 = (5 ± 7) / 2
x1 = 6
x2 = - 1
3x1 + 3x2 = 3 × 6 + 3 × (-1) = 18 - 3 = 15
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Ответ:
3x²-5x-2=0
D = 25 + 24 = 49
x1/x2 = (5 ± 7) / 2
x1 = 6
x2 = - 1
3x1 + 3x2 = 3 × 6 + 3 × (-1) = 18 - 3 = 15