Simplify the expression below as mich as possible
(6+3i) +(8+4i) -(1+4i)
a. 13+11i
b. 15+3i
c. 13+3i
d. 15+11i

c. 13 + 3i

(6 + 3i) + (8 + 4i) - (1 + 4i)

(6 + 3i) + (8 + 4i)
(since you're adding, there's no need to change signs, just add like terms)
6 + 8 = 14     3i + 4i = 7i
7i + 14

(7i + 14) - (1 + 4i)
(since you're subtracting, you have to change signs for the second binomial and then add like terms)
7i + 14 - 1 - 4i
7i - 4i = 3i     14 - 1 = 13
3i + 13