Odpowiedź:
y = x² - 2x - 1
- 4x - y - 2 = 0
y = x² -2x - 1
- y = 4x + 2
y = x² - 2x - 1
y = - 4x - 2
x² - 2x - 1 = - 4x - 2
x² - 2x + 4x - 1 + 2 = 0
x² + 2x + 1 = 0
(x + 1)² = 0
x + 1 =0
x = - 1
y = - 4x - 2 = - 4 * (- 1) - 2 = 4 - 2 = 2
Odp: x = - 1 , y = 2