Question

Simplify each of the following and express it in the form a + ib :

(3 + √-16) - (4 - √-9)

Answer 1

Given : (3 + √-16) - (4 - √-9)

We re – write the above equation

= (3 + 4i) – (4 – 3i)

Now, we open the brackets, we get

3 + 4i – 4 + 3i

= -1 + 7i