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14-02-2020
Mathematics

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Multiply and simplify the following complex numbers: (5+2i)⋅(−5−i)

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jimrgrant1 jimrgrant1

14-02-2020

Answer:

- 23 - 15i

Step-by-step explanation:

Given

(5 + 2i)(- 5 - i ) ← expand the factors using FOIL

= - 25 - 5i - 10i - 2i² → i² = - 1

= - 25 - 15i + 2

= - 23 - 15i

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