Question

Fill in the missing term in the equation

Answer 1

The missing term is (2 + i) [5 - (1 + 2i)]

Explanation:

Let the missing term be X

(1 + 2i)(2 + i) + X = 5(2 + i)

X = 5(2 + i) - (1 + 2i)(2 + i)

X = (2 + i) [5 - (1 + 2i)]

The missing term is (2 + i) [5 - (1 + 2i)]