1. (x + 1)(x − 2)(x + 4)

2. (x − 2)(x + 2)(x − 1)

3. (x − 1)2(x + 3)

4. (x + 5)(x − 2)(x + 4)

5. (2x + 3)(x + 1)(x + 3)

6. p = 5