Perform the operation. Write the answer in $a + b i$ form. $( 9 - 4 i ) - ( 3 + 6 i )$
A) $6 + 10 i$
B) $6 - 10 i$
C) $6 i - 10$
D) $6 i + 10$

Name: Perform the operation. Write the answer in $a + b i$ form. $( 9 - 4 i ) - ( 3 + 6 i )$ A) $6 + 10 i$ B) $6 - 10 i$ C) $6 i - 10$ D) $6 i + 10$
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Question

Quizplus · Accepted Answer

To subtract complex numbers, we subtract the real parts and the imaginary parts separately. So, 
\begin{align*}
(9-4i)-(3+6i) &= 9-4i-3-6i \
&=6-10i \
&= \boxed{6 - 10i}
\end{align*}

Perform the Operation a+bia + b ia+bi Form (9−4i)−(3+6i)( 9 - 4 i ) - ( 3 + 6 i )(9−4i)−(3+6i)

Perform the Operation $a + b i$ Form $( 9 - 4 i ) - ( 3 + 6 i )$