Question

The expression (3+i)(1+2i) can be written Jim the form a +bi, where a and b are integers. What are the values of a and b?

Answer 1

a = 1

b = 7

Explanation:

We start by opening the brackets

We have;

3 + 6i + i - 2

= 1 + 7i

comparing with a + bi

a = 1 and b = 7