Question

Find the equation of the axis of symmetry of the following parabola using graphing technology.
y, equals, x, squared, plus, 6, x, plus, 17
y=x
2
+6x+17
Answer
Attempt 1 out of 2

Answer 1

The axis of symmetry is the vertical line through the vertex at x = -b/(2a) = -6/(2·1) = -3.
So the equation is x = -3.

(Completing the square: y = (x+3)^2 + 8, vertex at (-3,8).)