Use a geometric model to factor 2x2 − x − 1 by following these steps:

Step 1: Model the polynomial by placing tiles in the Product section.

Step 2: Drag one zero-pair tile to the product area. Then use the tiles in the product area to form a rectangle.

Step 3: Drag tiles to the sections labeled Factor 1 and Factor 2 to represent the factors.

Step 4: What is the factored form of this trinomial?
 (2x − 1) (x + 1)
 (2x + 1) (x − 1)
 (2x − 1) (x − 1)