jasaide15
06.06.2020 •
Mathematics
1. Find the product: (4 + 6i)(7-2i)
a. 11 + 4i
b. 28 - 12i
c. 40 + 34i
d. 62 - 12i
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Ответ:
c
Step-by-step explanation:
(4 + 6i)(7-2i)=
28-8i+42i-12i^2
i^2=-1, so
28+12-8i+42i
40+34i
answer is c
Ответ:
It is 120
Step-by-step explanation: