### Home > CAAC > Chapter 2 > Lesson 2.1.2 > Problem 2-21

2-21.

Use the tiles in the eTool below to write the algebraic expression.

Click the link at right for the full version of the eTool: AC 2-21 HW eTool

To solve this problem, you will need to group the shapes by their area. How many *x*-tiles are there? *x*^{2}-tiles? Count the number of each different area.

6*x*^{2} + 4*x* + 3*xy* + 6*y* + *y*^{2}