whats the line of symmetry

Question

2x^2-8=0 what is the line of symmetry for this problem

Answer 1

b = 0, therefore symmetry is at x = 0. x = -b/2a = -0/(2*2) = 0

Answer 2

For the parabola y = ax² + bx + c the line of symmetry passes through the vertex, so x = -b/(2a), in general.

Worth remembering.

Answer 3

Symmetry at x = 0.