Solve the quadratic equation?????

Question

Solve the quadratic equation using the method of your choice:

x² + 6x - 1 = 0

Answer 1

Can use completing the square method or quadratic formula.

Complete the square: x² + 6x - 1 = 0

x² + 6x = 1

Need to complete the square by adding (6/2)², or 9 to both sides

x² + 6x + 9 = 1 + 9 = 10

Factoring: (x + 3)(x + 3) = 10

(x + 3)² = 10

Take square root of both sides: x + 3 = √10

Answer: x = -3 ± √10

Can check using quadratic equation.