2 years ago

What's (9+9i)(-1-5i) using foil method

Mathematics

1 answer:

hammer [34]2 years ago

5 0

Answer:

36-54i

Step-by-step explanation:

(9+9i)(-1-5i)

-9-9×5i-9i-9i×5i

-9-45i-9i-45i^2

-9-45i-9i-45×(-1)

(-9)-45i-9i+(45)

36(-45i)(-9i)

36-54i

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See Explanation

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