Question

X^2+2x-8
fine vertical line of symmetry

Answer 1

x = - 1

Explanation:

given a parabola in standard form

ax² + bx + c ( a ≠ 0 )

then the vertical axis of symmetry is

x = -
`(b)/(2a)`

x² + 2x - 8 ← is in standard form

with a = 1, b = 2 , then

x = -
`(2)/(2)` = - 1

equation of axis of symmetry is x = - 1