1. Solve the following quadratic equations

1. (a-3) (a+5) = 0

2. (d-5) (3d-2)= 0

3. Solve a² - 3a + 2= 0

4. b² - 9 = 0

5. What is a universal set

6. What is a null set.

7. Given that the universal set is equal to the numbers of the week. And T is such a set whose elements are days of the weeks that start with letter T. Draw a vein diagram to show the elements of the The universal set and T

8.