Question

If a=5+2i, b=-3+i and c=4i(2+3I), determine ab+c in simplest a+bi form

Answer 1

-29+7i

Explanation:

(5+2i)(-3+i)

-15+5i-6i+2i²

i²=-1

Simplify

-17-i

Add c

c=4i(2+3i)

=8i+12i²

=8i-12

-17-i+8i-12

-29+7i