Question

Identify the axis of symmetry and vertex of f(x) = –2x^2 –2x–1.

A) Axis of symmetry: x = 0.5; Vertex: (0.5, – 0.50)
B) Axis of symmetry: x = – 0.5; Vertex: (– 0.5, 0.50)
C) Axis of symmetry: x = – 0.5; Vertex: (– 0.5, – 0.50)
D) Axis of symmetry: x = 0.5; Vertex: (– 0.5, – 0.50)

Answer 1

here is the formula to find x-coordinate of vertex\[\rm x=\frac{ -b }{ 2a }\]
x coordinate of vertex= axis of symmetry

Answer 2

and then substitute all x's by its value into f(x) function to find y-coordinate of the vertex

Answer 3

need help ?