2. An = A . A ……..A
A0 = 1
A-1 = 1/ A1
A1= A

3. (3+2i)2
(3+2i) (3+2i)=
9+12i-4=
5+12i

4. (1-2i)3 (-3-4i) (1-2i)=
(1-2i) (1-2i)= -3+6i-4i+8i2=
1-2i-2i+4i2= -3+2i-8
-3-4i -11+2i