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Home > A2C > Chapter 8 > Lesson 8.1.5 > Problem 8-83

8-83.
  1. Change each of the following equations to graphing form and then, without graphing, identify the vertex and axis of symmetry for each. Homework Help ✎

    1. y = 3x2 −18x + 26

    2. y = 3x2 − 4x − 11

Complete the square to get the equation in graphing form.

The axis of symmetry is the same as the x-coordinate of the vertex.

vertex: (3, −1)
axis of symmetry: x = 3