Question

(5 - 2i) + (-4 + 81)
O A. 5i
B. 7i
O c. 1-6
D. 1 + 6

Answer 1

1 + 6i

we open the brackets to give us

5 - 2i - 4 + 8i

collecting like terms, we have,

-2i + 8i + 5 - 4

6i + 1

or

1 + 6i

Answer 2

82 - 2i

Explanation:

(5 - 2i) + (-4 + 81)

5 - 2i + 77

= 82 - 2i