Question

please solve above complex no question.​

Answer 1

i^4 = 1 and i^3 = -i

So, this can be simplified as

a + 3ia + bi - b - 5i = 0.

So, only 0 means real and complex both parts are zero.

So, a - b = 0 and 3a + b - 5 = 0, or 3a + b = 5.

So, you have to solve this equations to get answer.

May I made a mistake, in solving this but this is a perfect approach for solving this kind of questions.