Question

(10+i)^2 = (in form a+bi)

Answer 1

99+20i

Explanation:

(10+i)^2

➡

(10 + i) × (10 + i) = 100 + 10i + 10i + i^2 add like terms

100 + 20i + i^2 since i^2 = -1 we can write the expression like this

99 + 20i