Algebra and Trig question. Please show work. Serious replies only! Thankyou so much!?

Question

Subtract: ( 9 - 6i) - ( -7i -5)

a). 4 - 13 i
b).4+ i
c). 14- 13i
d).14 + i

Answer 1

(9 - 6i) - (-7i - 5)

This is simply algebra and collecting like-terms. The only difference is that we must express our answer in the form a + bi.

9 - 6i + 7i + 5
14 + i

Answer 2

(9 - 6i) - (-7i - 5) = (9 - (-5)) + (-6i - (-7i)) = 14 + i

Answer D.