A rectangle with an area of x2 – 4x – 12 square units is represented by the model. An algebra tile configuration. In the Product spot are 21 tiles in 3 rows. 1 tile is labeled x squared. In the same row are 6 tiles labeled negative 6. Below x squared are 2 tiles labeled x, and to the right of the x tiles are 12 tiles labeled negative. What side lengths should be used to model the rectangle? (x 2) and (x – 6) (x 6) and (x – 2) (x 2) and (x – 10) (x 10) and (x – 2).