1. $(x+3)(x+3) = $

2. $(x+2)(x+2) = $

3. $(x-1)(x-1) = $

4. $(2x+1)(2x+1) = $

5. $(x+5)(x-5) = $

6. $(x+3)(x-3) = $

7. $(x+1)(x-1) = $

8. $(2x+2)(2x-2) = $

9. $(x^2+5)(x^2-5) = $