Question

Solve by completing the square. 2x^2 – 2x – 4 = 0

Answer 1

Explanation:

Factor out 2,

x² - x - 2 = 0

x² - x = 2

x² - x + (-1/2)² = 2 + (-1/2)²

(x - 1/2)² = 9/4

x = ±3/2 + 1/2

x = 2 or x = -1