1. Multiplying Binomials using the Grid Method Feb. 2007 S. Calahan

2. The problem: (x + 3)(x + 2)  Set up the first expression on the top of the grid.  x + 3

3. Step 2: Place the second expression on the side. x + 3  x + 2

4. Multiply by the top x x + 3 x + 2 (x)(x) 2x

5. Multiply by 3 x + 3 x + 2 x2x2 3x 2x6

6. Add like terms  Our answer would look like this x 2 + 2x + 3x +6 = x 2 + 5x + 6

7. Try another one. (x – 4)(x + 4) X - 4 X + 4

8. Multiply by the top x X - 4 X + 4 x2x2 4x

9. Multiply by -4 X - 4 X + 4 -4x -16 x2x2 4x

10. Write the answer X 2 +4x -4x -16 X 2 - 16