Ответ:
1)D = b2 - 4acD = 9 - 4 * 1 * 2 = 1x1 и 2 = 3 +- 1 / 2x1 = 2x2 = 12)D = 9 - 4 * 1 * 2 = 1x1 = -3 + 1 / 2 = -1x2 = -3 - 1 / 2 = -2
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Ответ:
1)
D = b2 - 4ac
D = 9 - 4 * 1 * 2 = 1
x1 и 2 = 3 +- 1 / 2
x1 = 2
x2 = 1
2)
D = 9 - 4 * 1 * 2 = 1
x1 = -3 + 1 / 2 = -1
x2 = -3 - 1 / 2 = -2