Use a geometric model to factor 3x2 + 4x + 1 by following these steps:

Step 1: Model the trinomial by placing tiles to form a rectangle in the top left corner of the Product section.

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

Step 3: What is the factored form of this trinomial?
 (x − 1) (3x + 1)
 (3x + 1) (x + 1)
 (3x − 1) (x + 1)
 (3x − 1) (x − 1)