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Alexxandr [17]
2 years ago
15

And this (4+i)(4-i) show work so i can understand pls ;-;

Mathematics
2 answers:
Andreas93 [3]2 years ago
8 0

Answer:

17

Step-by-step explanation:

(a+b)(a-b)=a^2-b^2

4^2 - i^2

16 - (-1)

17

i^2= -1

Irina18 [472]2 years ago
4 0
  • (a+b)(a-b)=a^2-b^2

\\ \tt\longmapsto (4+I)(4-i)

\\ \tt\longmapsto 4^2-i^2

\\ \tt\longmapsto 16+1

\\ \tt\longmapsto 17

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