5.2.3 Operations with Complex Numbers - Worksheet
Example 1: Graph each complex number . 1. 4 2. − i
3. 3 + 2 i
4. − 2 − 3 i
Example 2: Find each absolute value. 5. | 4 − 5 i|
6. | − 33.3 |
7. | − 9 i|
8. | 5 + 12 i|
9. | − 1 + i|
10. | 15 i|
Example 3: Add or subtract. Write the result in the form a + bi . 11. (2 + 5 i ) + ( − 2 + 5 i ) 12. ( − 1 − 8 i ) + (4 + 3 i )
13. (1 − 3 i ) − (7 + i )
14. (4 − 8 i ) + ( − 13 + 23 i )
15. (6 + 17 i ) − (18 − 9 i )
16. ( − 30 + i ) − ( − 2 + 20 i )
Example 4: Find each sum by graphing on the complex plane. 17. (3 + 4 i ) + ( − 2 − 4 i )
18. ( − 2 − 5 i ) + ( − 1 + 4 i )
19. ( − 4 − 4 i ) + (4 + 2 i )
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