Question

What is the axis of symmetry for f(x) = −5x2 − 20x − 10?

x = 6

x = −6

x = 2

x = −2

Answer 1

the axis of symmetry of a parabola

\[y = ax^2 + bx + c\]

is found using

\[x = \frac{-b}{2a}\]

in your question b = -20 and a = -5

just substitute and evaluate