Question

Solve x^2 + 6x + 7 = 0.

x = −1 and x = −5
3 plus or minus square root of 2
negative 3 plus or minus square root of 2
quantity of negative 3 plus or minus square root of 2 all over 2

Answer 1

x = -3 ± √2

Explanation:

x² + 6x + 7 = 0

x² + 6x + 9 = -7 + 9

(x + 3)² = 2

x + 3 = ±√2

x = -3 ± √2