codey48ad codey48ad

26-01-2022
Mathematics

contestada

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

Respuesta :

Аноним Аноним

27-01-2022

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

[tex]\\ \tt\longmapsto (4+I)(4-i)[/tex]

[tex]\\ \tt\longmapsto 4^2-i^2[/tex]

[tex]\\ \tt\longmapsto 16+1[/tex]

[tex]\\ \tt\longmapsto 17[/tex]

Answer Link

dynamike dynamike

27-01-2022

Answer:

17

Step-by-step explanation:

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

4^2 - i^2

16 - (-1)

17

i^2= -1

Answer Link

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