Question

Solve the equation 2x^2+8x-1=0 by completing the square.

Answer 1

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Answer 2

Answer:

x = 0.12 or x = -4.12.

Explanation:

2x² + 8x - 1 = 0

2(x + 2)² - 9 = 0

2(x + 2)² = 9

(x + 2)² = 4.5

x = √4.5 - 2 or x = -√4.5 - 2

x = 0.12 or x = -4.12.