jonathan2552526 jonathan2552526

24-11-2020
Mathematics

contestada

What is the sum of 4 - 7i and the conjugate of 2 + 3i ?
A.6 - 4i
B.8 - 21i
C.8 - 4i
D.6 - 10i

Respuesta :

LammettHash LammettHash

24-11-2020

The conjugate of a complex number z = a + b i is z * = a - b i. So

(4 - 7i ) + (2 + 3i )* = (4 - 7i ) + (2 - 3i )

… = (4 + 2) + (-7i - 3i)

… = 6 - 10i

and the answer is D.

Answer Link

Otras preguntas

(-18)+(-7)+25 my answer was 36 but i just want to confirm

How are biotic factors and abiotic factor related

how to do this question plz answer my question plz

How long does it take an automobile traveling 66.7 km/h to become even with a car that is traveling in another lane at 52.7 km/h if the cars' front bumpers are

Which statement best analyzes how the author portrayal of Mr.Nilson’s conflicting motivations advances the plot and theme of the japanese quince?

HELP ALGEBRA IS KILLING ME IMAGE IS BELOW

Alfred is grain farmer that usually stores his soybeans at a local elevator. What would he do just to use the options market to create synthetic storage after h

NEED HELP ASAP Which angle pairs are supplementary? Check all that apply. <1 and <2 <4 and <3 <4 and <5 <7 and <5 <3 and <6

Which statement accurately describes lines of laditude also called parallels on a map? A. They measure distance east and west of the equator B. They measure the

What is the meaning to this reading?The Nightingale by Kristin Hannah: If I have learned anything in this long life of mine, it is this: In love we find out w