lizzethmoraless12 lizzethmoraless12

26-04-2019
Mathematics

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(-4+2i)(7-2i)
Anyone know how to do this??

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altavistard altavistard

26-04-2019

Answer:

-24 + 22i

Step-by-step explanation:

Use the FOIL method of multiplication of binomials:

(-4+2i)(7-2i) = -28 + 14i + 8i - (-4)i²

Note that i² = -1. Thus, - (-4)i² = +4, and we then have:

-28 + 22i + 4, or

-24 + 22i

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