Find $( 8 - 5 i ) ( - 2 - i )$ and express the answer in the standard form of a complex number.
A) $- 16 - 18 i$
B) $21 - 2 i$
C) $- 11 + 2 i$
D) $- 21 + 2 i$

Question

Quizplus · Accepted Answer

To multiply two complex numbers, distribute each part of the first complex number over the second, then combine like terms: $(8 - 5i)(-2 - i) = -16 - 8i + 10i + 5i^2$. Since $i^2 = -1$, this simplifies to $-16 + 2i + 5(-1) = -21 + 2i$.

Find (8−5i)(−2−i)( 8 - 5 i ) ( - 2 - i )(8−5i)(−2−i)

Find $( 8 - 5 i ) ( - 2 - i )$