Factoring with Algebra Tiles
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See Homemade Algebra Tiles
for the template for making tiles for your students to use in class.

Key:  

 

Factor x2 + 5x + 6

Using algebra tiles, build a rectangle containing the tiles specified in this problem (1 x2-tiles, 5 x-tiles and 6 1-tiles).  Remember that the lines between the tiles within your pattern must be completely vertical or horizontal across the entire pattern.  Here is one possible arrangement:

 

After the pattern is established, it can be seen that the top edge of the pattern (the length) is composed of tiles with dimensions x + 3.  The side edge of the pattern (the width) is composed of tiles with dimensions
x + 2.
Consequently,  x2 + 5x + 6 = (x + 3)(x + 2).