cameroncowan13 cameroncowan13
  • 20-08-2020
  • Mathematics
contestada

8-i/6+i =(simplified in form a + bi)

Respuesta :

jimrgrant1 jimrgrant1
  • 20-08-2020

Answer:

[tex]\frac{47}{37}[/tex] - [tex]\frac{14}{37}[/tex] i

Step-by-step explanation:

Given

[tex]\frac{8-i}{6+i}[/tex]

Multiply numerator/ denominator by the conjugate of the denominator.

The conjugate of 6 + i is 6 - i, thus

= [tex]\frac{(8-i)(6-i)}{(6+i)(6-i)}[/tex] ← expand numerator/ denominator using FOIL

= [tex]\frac{48-14i+i^2}{36-i^2}[/tex] → substitute i² = - 1

= [tex]\frac{48-14i-1}{36+1}[/tex]

= [tex]\frac{47-14i}{37}[/tex]

= [tex]\frac{47}{37}[/tex] - [tex]\frac{14}{37}[/tex] i

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