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Home > CCA > Chapter 8 > Lesson 8.2.5 > Problem 8-106

8-106.
  1. For each quadratic function below, use the idea of completing the square to write it in graphing form. Then state the vertex of each parabola. 8-106 HW eTool (CPM). Homework Help ✎

    1. f(x) = x2 + 6x + 15

    2. y = x2 − 4x + 9

    3. f(x) = x2 + 8x

    4. y = x2 + 5x − 2

Set up tiles to reflect the problem.

Write an equivalent equation using the tile arrangement.

f(x) = (x + 3)2 + 6, vertex at (−3, 6)

Refer to part (a.)

You will need to add and subtract the same number of tiles on the right side of the equation in order to complete a square.

You will need to add and subtract the same number of tiles on the right side of the equation in order to complete a square.

Use the eTool below to help complete these problems.
Click the link at right for the full version of the eTool: CCA 8-106 HW eTool