Add or subtract as indicated and write the result in standard form.
-$$( 9 + 9 i ) - ( - 6 + i )$$
A) $15 + 8 i$
B) $15 - 8 \mathrm { i }$
C) $3 + 10 i$
D) $- 15 - 8 \mathrm { i }$

Question

Quizplus · Accepted Answer

To solve this, we add the real parts and the imaginary parts separately: $9 - (-6) = 15$ for the real parts and $9i - i = 8i$ for the imaginary parts, resulting in $15 + 8i$.

Add or Subtract as Indicated and Write the Result in Standard