fbintsula0001 fbintsula0001
  • 25-05-2019
  • Mathematics
contestada

Find the product of -7-i and its complex conjugate

Respuesta :

gmany
gmany gmany
  • 25-05-2019

Answer:

50

Step-by-step explanation:

[tex]-7-i\\\\\text{complex conjugate:}\ -7+i\\\\(-7-i)(-7+i)\qquad\text{use}\ (a+b)(a-b)=a^2-b^2\\\\=(-7)^2-(i)^2\qquad\ i=\sqrt{-1}\to i^2=-1\\\\=49-(-1)\\\\=49+1\\\\=50[/tex]

Answer Link

Otras preguntas

What is the volume, in cubic inches of 1 of the small cubes
The height of a triangle is 4 m less than its base. The area of the triangle is 48 m^2.What is the length of the base?​
PLZ HURRY DIS IS TIMED !!!!
The point (2,3) is on the line given by which equation below?
Ayer tuve que hacer unas diligencias en la ciudad pero me fue fatal. Primero, fui a la frutería pero estaba (1) (cerrar). Entonces decidí ir al banco a cambia
To say that a student lumbered into a room rather than walked into a room is to emphasize which quality in the student?
Cells that are rapidly undergoing mitosis constantly repair and renew the lining of the pharynx and the esophagus, which is particularly vulnerable to abrasion
Help what is 10*_=60
the answer to this question please
Explain what the following person should do in this situation, according to your morals: Stephen planned to go to PopCon in Indianna From June 7th, Friday-June