Вариант 1 Решите уравнения

Question

Вариант 1
Решите уравнения

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Answer 1

X - 2 = 4²
x - 2 = 16
x = 16 + 2
x =18

3x- 2 = x²
- x² + 3x - 2 = 0
x² - 3x + 2 = 0
D = b² - 4ac = 9 - 4 × 2 = 9 - 8 = 1
x1 = ( 3 + 1) / 2 = 2
x2 = ( 3 - 1) / 2 = 1

5x + 14 - x = 8²
4x + 14 = 64
4x = - 14 + 64
4x = 50
x = 50/4
x = 12,5