2. Model the following problem using algebra tiles: (x + 4)(x – 4) x + 4 x - 4 x2x2

3. Model the following problem using algebra tiles: (x + 4)(x – 4) x + 4 x - 4 x2x2 Remove the zero pairs.

4. Model the following problem using algebra tiles: (x + 4)(x – 4) x + 4 x - 4 x2x2 Remove the zero pairs.

5. Model the following problem using algebra tiles: (x + 4)(x – 4) x + 4 x - 4 x2x2 Remove the zero pairs.

6. Model the following problem using algebra tiles: (x + 4)(x – 4) x + 4 x - 4 x2x2 Remove the zero pairs.

7. Model the following problem using algebra tiles: (x + 4)(x – 4) x + 4 x - 4 x2x2 Remove the zero pairs.

8. x + 4 x - 4 x2x2 Remove the zero pairs. What remains is x2 x2 – 16. Model the following problem using algebra tiles: (x + 4)(x – 4)

9. Factor x2 x2 – 64. x 2 = x  x64 = 8  8 x 2 – 64 = (x + 8)(x – 8)

10. Factor 36x 2 – 121. 36x 2 = 6x  121 = 11  36x 2 – 121 = (6x + 11)(6x – 11)

11. Factor 3x 2 -48. First, factor out the three. 3(x 2 -16) Now factor the difference of the squares. 3(x + 4)(x – 4)

12. Factor each polynomial.