Simplify. Write your answer in the form a + bi, where a and b are real numbers.
-$$( - 9 + 16 \mathrm { i } ) - ( 7 - 4 \mathrm { i } )$$
A) $- 16 - 20 \mathrm { i }$
B) $- 16 + 20 \mathrm { i }$
C) $- 2 - 20 \mathrm { i }$
D) $2 - 20 \mathrm { i }$

Question

Quizplus · Accepted Answer

To simplify the expression, subtract the real parts and the imaginary parts separately: $(-9 + 16i) - (7 - 4i) = -9 - 7 + 16i + 4i = -16 + 20i$.

Simplify Write Your Answer in the Form a + Bi (−9+16i)−(7−4i)( - 9 + 16 \mathrm { i } ) - ( 7 - 4 \mathrm { i } )(−9+16i)−(7−4i)

Simplify Write Your Answer in the Form a + Bi $( - 9 + 16 \mathrm { i } ) - ( 7 - 4 \mathrm { i } )$