dankness216 dankness216
  • 21-09-2018
  • Mathematics
contestada

Which expression is equal to −2i(4−i)?


A. −2−8i

B. 8−2i

C. 2−8i

D. −8−2i

Respuesta :

qterya15
qterya15 qterya15
  • 21-09-2018

The answer is A -2-8i


Answer Link
erinna erinna
  • 23-09-2019

Answer:

The correct option is A.

Step-by-step explanation:

The given expression is

[tex]-2i(4-i)[/tex]

We need to find the simplified form of the given expression.

Using distributive property we get

[tex]-2i(4)-2i(-i)[/tex]

[tex]-8i+2i^2[/tex]

We know that [tex]i^2=-1[/tex]. Using this fact we get

[tex]-8i+2(-1)[/tex]

[tex]-8i-2[/tex]

Write the above expression as a+ib.

[tex]-2-8i[/tex]

Therefore the correct option is A.

Answer Link

Otras preguntas

--+--+--+--+-- =30.Solve the puzzle with the --+--+--+--+-- =30.Solve the puzzle with the numbers(1,3,5,7,9,11,13,15).Numbers can be repeated.Only addition ope
simplify the expression. 3 square root 5/64
I need help solving x^2+3xy-y^2=12 and x^2-y^2=-12
I need help solving x^2+3xy-y^2=12 and x^2-y^2=-12
What is the prime factorization of 28
a bottle contains red marble and blue marbles. a marble is chosen at random and not replaced. then a second marble is chosen at random. determine the probabilit
define orogenesis and locate major orgenic belts on the earth today
A potter use 3/5 of a pound of clay to make a bowl.How many bowls the potter make from 10 pounds.
A number is thrice the second number. The second number is also twice the third number. If the average of the three numbers is 18, find the numbers.
2x squared + 9x=-5 i need to solve for x