Let z 2 3i and w 9 4i Compute the following and express y

Let

z = 2 + 3i

and

w = 9 4i.

Compute the following and express your answer in

a + bi

form.

z + w

Solution

z + w = 2 + 3i +9 - 4i

= 2 + 9 + 3i - 4i

= 11 - i or 11 - 1i or 11 + -1i