Write h(x) = x2 − 6x + 3 in vertex form by following these steps:
Step 1: Model x2 − 6x + 3 by placing tiles in the Product section. First place the x2 and −x tiles
along the left and top borders to form two sides of a square. Then place the + tiles along the ends of the −x tiles.
Step 2: Form a square of tiles in the product section. Add as many zero-pair tiles as necessary. Move the extra − tiles off to the side.
Step 3: Drag tiles to the sections labeled Factor 1 and Factor 2 to represent the factors of the tiles in the square.
Step 4: What trinomial is represented by the tiles in the square?
(x − 3)(x − 3) = x2 − 6x + 9
(x + 3)(x + 3) = x2 + 6x + 9
(x − 3)(x + 3) = x2 − 9
Step 5: What number do the extra tiles represent?
6
−6
Step 6: Identify the vertex form of the function. h(x) = (x − 3)2 − 6 h(x) = (x + 3)2 − 6