Find the equation of the axis of symmetry for the parabola

y = x2 + 6x + 9

Answer: x = - 3

Step-by-step explanation:

The equation is in a standard form of equation as;

y = ax^2 + bx + c, and therefore, the axis of symmetry is given by the formula,

X = - b / 2a.

Therefore using that in the question, a = 1 and b = 6

Therefore, the axis of symmetry is:

x = - (6) / 2 (1) which gives

x = - 3