Answer:
B.
Explanation:
- Multiplying both numerator and denominator by (5 - 4i) , the conjugate of the denominator, i. e, (5 + 4i).
- Multiplying (4+4i) and (5-4i) using distributive property
- Using the identity (a+b)(a-b)= a² - b² where 5 will act as a and 4i will act as b
(combining like terms)
distributing the denominator
That is, option B.