Задание 12

Решите уравнения:

1.
12.52 = 2
2.
82 0.5 = 0
3.
x2 + 6.5x 3.5 = 0
4.
0.5x2 9 + 1.5x = 0

Answers

1.
12.52 = 2
x = ± 20 125
x = ±0.16
x = ±0.4
2.
82 0.5 = 0
8x2 = 0.5
x2 = 1 16
x = ±0.25
3.
x2 + 6.5x 3.5 = 0
D = 42.25 + 14 = 56.25 = 7.52
D > 0, ypaвнение имеет 2 решения.
x1 = 1 2, x2 = 7
4.
0.5x2 + 15x 9 = 0
x2 + 3x 18 = 0
D = 9 + 72 = 81 = 92
D > 0 ypaвнение имеет 2 решения.
x1 = 62 = 3, x2 = 122 = 6
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2021-07-04 00:00
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