alexismhoman alexismhoman
  • 21-12-2018
  • Mathematics
contestada

Which of the following expressions is equal to 2x^(2)+8?
(2x-4i)(x+2i)
(2x-4i)(x-2i)
(2x+4i)(x+2i)
(2x-2i)(x+6i)

Respuesta :

Professor1994 Professor1994
  • 21-12-2018

Answer:

The expression equal to 2x^(2)+8 is:

First option (2x-4i)(x+2i)

Step-by-step explanation:

If we multiply

(2x-4i)(x+2i)=(2x)(x)+(2x)(2i)-(4i)(x)-4i(2i)

(2x-4i)(x+2i)=2x^(1+1)+4xi-4xi-8i^(1+1)

Simplifying:

(2x-4i)(x+2i)=2x^2-8i^2

and i^2=-1, then:

(2x-4i)(x+2i)=2x^2-8(-1)

Multiplying:

(2x-4i)(x+2i)=2x^2+8

Answer Link

Otras preguntas

help me out please.. thank uu
What were John Cabot's characteristics?
What is the averge speed of a plane flying 2,184 miles from knoxville tn to los angeles ca in 7 hours
What is the value of r in the equation 5 ( r − ( − 2 ) ) = − 10
Find two consecutive integers whose product is 90.
Ummmmmmmm I need help
i missed a day of school and we started a new unit lol
Primeras impresiones 1. ¿Cómo reaccionaste cuando leiste que los personajes se habían quedado dormidos en el cine Interpretaciones del texto 2. ¿Cómo es el jove
Please help mee1. A body weighing 2 kg moves in a straight line with a speed of 72 km / h. If the force 10N will act on the body, after how long will its speed
function of pons for class 7​