Find the product or quotient. Write the answer in standard form.
-$( 9 - 5 i ) ( 6 - 4 i )$
A) $74 + 6 \mathrm { i }$
B) $34 - 66 i$
C) $20 \mathrm { i } ^ { 2 } - 66 \mathrm { i } + 54$
D) $34 + 66 \mathrm { i }$

Question

Quizplus · Accepted Answer

The product of two complex numbers $(a + bi)(c + di)$ is calculated as $ac + adi + bci + bdi^2$. Here, $i^2 = -1$. So, $(9 - 5i)(6 - 4i) = 54 - 36i - 30i + 20i^2 = 54 - 66i - 20 = 34 - 66i$.

Find the Product or Quotient (9−5i)(6−4i)( 9 - 5 i ) ( 6 - 4 i )(9−5i)(6−4i)

Find the Product or Quotient $( 9 - 5 i ) ( 6 - 4 i )$