4.6 Complex Numbers
Simplify the powers of the imaginary unit.
1. i23
2. i305
3. i67
Simplify
4. i
5. i i 
6. i i 
7. i (i) i
8. i i
9. i(i)
10. (i)(i)
11.
(-i)(i)
13. How are the following problems different?
Simplify:
x - (x)
Simplify:
i (i)
12. (i)
2
Simplify #14-21. (hint: don’t forget to find the conjugate)
Solve #22-25
2
6
14.

15.
4i
8i
17.
1  8i
i
18.
20.
3  7i
7  10i
21.
23. 5(x+2)2+7 = 3
5i
2  6i
4  10i
3  4i
24. 2(x4)2 = 11
16.
10  10i
5i
19.
2i
2  8i
22. 5x2+13 = 2x2 + 4
25. 4(x4)2+14 = 0