Solve the following equations
(i) x² + 3 = 0              

(ii) 2x² + x + 1 = 0            

(iii) x² + 3x + 9 = 0

4

(i) 4 – 3i              (ii)                  (iii) –i

5

Express the following expression in the form of a + ib:

7

Solve the following equations
(i) –x² + x – 2 = 0               

(ii) x² + 3x + 5 = 0          

(iii) x² - x + 2 = 0

8

i. = 0        ii. x + 3 = 0            
 iii. x² + x + = 0         iv. x² + = 0