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Home > CC2 > Chapter 5 > Lesson 5.3.2 > Problem 5-113


Write the expression as shown on the Expression Mats. Then simplify by making zeros and combining like terms.  

Shaded tile is plus 1.  Tile is negative 1.

  1. An equation mat with the following tiles: Row 1:1 positive x and 1 positive unit. Row 2, 1 negative x, and 2 negative units. Row 3: 1 negative x, 1 positive unit, 1 negative unit.

    Remember that shaded tiles are positive and white tiles are negative.

  1. An equation mat with the following tiles. Row 1: 1 negative x, 2 positive x, 1 x squared. Row 2: 1 positive unit, and 1 negative unit tile.

Use the eTool below to solve the problems in part a and b.
Click the link at right for the full version of the eTool: 5-113 HW eTool (CPM)