1. Calculate the following:
a
(3 + 6i)(2 + 5i)
b
(4 − 3i)(1 + 2i)
c
(1 + 2i)(2 + i)
d
(3 − 4i)(6 + 2i)
e
(3 + 4i)2
f
(5 − i)2
g
i(2 + 4i)(3 + 5i)
h
(1 + 3i)3
i
(4i)3
j
(-5i)4
k
(1 + 3i)4
l
(1 + 2i)5
m
n
o
p
q
r
s
t
u
2. Let k = 2 + i , t = 1 − 2i and w = 3 + 4i and  is the conjugate of k.
a
b
c