Mathematics: How do i solve this? (6+8i)(4-7i)step by step? ? i just need a

How do i solve this? (6+8i)(4-7i)step by step? ?

Ответ:

nsuleban9524

09.03.2022

$Use:\\\\FOIL:\\(a + b)(c + d) = ac + ad + bc + bd\\\\i=\sqrt{-1}\to i^2=-1\\-----------------------\\\\(6+8i)(4-7i)=(6)(4)+(6)(-7i)+(8i)(4)+(8i)(-7i)\\\\=24-42i+32i-56i^2=24-10i-56(-1)=24-10i+56\\\\=80-10i\\\\\ \boxed{(6+8i)(4-7i)=80-10i}$

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Ответ:

SoccerHalo

13.08.2021

Mathematics

6 x = 12
x = 12 : 6
x = 2

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How do i solve this? (6+8i)(4-7i)step by step? ? i just need a

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