# Express each of the complex number in the exercises 1 to 10 in the form a + ib : 3(7 + i7) + i (7 + i7)

**Solution:**

The given complex number is,

3(7 + i7) + i (7 + i7) = 21 + 21i + 7i + 7i²

= 21 + 28i + 7 x (- 1) [∵ i² = - 1]

= 14 + i28

NCERT Solutions Class 11 Maths Chapter 5 Exercise 5.1 Question 4

## Express each of the complex number in the exercises 1 to 10 in the form a + ib : 3(7 + i7) + i (7 + i7)

**Summary:**

A complex number is given. We have expressed the given complex number in the standard format to be 14 + i28.