Ответ:
2x²-5x-7
Объяснение:
D = (b²) - 4ac = 25 - 4 * 2 * (-7) = 25+56= 81 = 9²
x1 = (5+9):4= 3,5
x2 = (5-9):4= -1
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Ответ:
2x²-5x-7
Объяснение:
2x²-5x-7
D = (b²) - 4ac = 25 - 4 * 2 * (-7) = 25+56= 81 = 9²
x1 = (5+9):4= 3,5
x2 = (5-9):4= -1