Question

Find the equation of the axis of symmetry and the coordinates of the vertex of the graph of the function y = –2x^2 +6x – 1.

A) x = 3; vertex: (3, 35)
B) x = -1.5; vertex: (-1.5, -14.5)
C) x = 1.5; vertex: (1.5, 3.5)
D) x = -1.5; vertex: (-1.5, -5.5)

Answer 1

use(-b/2a,-D/4a) for vertex where D=b^2-4ac