carolimar carolimar

24-11-2019
Mathematics

contestada

realize the following operations and express the result in a+bi:

[tex](4 + 5i)( - 4 + \sqrt{ - 16} )[/tex]

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Yang100 Yang100

24-11-2019

Answer:

-4(i+9)

Step-by-step explanation:

(4+5i)(-4+sqrt(-16))

(4+5i)(-4+4i)

-16-20i+16i+20i^2

-16-4i+20(-1)

-16-4i-20

-4i-16-20

-4i-36

-4(i+9)

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