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How do I solve number 1 ?
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2 votes
How do I solve number 1 ?

How do I solve number 1 ?-example-1
User Ttemple
by
7.4k points

2 Answers

5 votes

Answer:

D.) 46 + 37i

Explanation:

(5 - 4i)(2 + 9i)

use the FOIL method

10 + 45i - 8i + 36

collect like terms

(10 + 36) + (45i - 8i)

simplify

46 + 37i

User Anis BEN NSIR
by
8.1k points
5 votes

Explanation:

(5−4i)(2+9i)

=(5+−4i)(2+9i)

=(5)(2)+(5)(9i)+(−4i)(2)+(−4i)(9i)

=10+45i−8x−36i2

=−36i2+37i+10

User Thul
by
8.7k points
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