emilylarkin emilylarkin
  • 02-10-2020
  • Mathematics
contestada

HELPPPP (COMLEX NUMBERS AND OPERATIONS


Write the expression 3i(2 - 5i)(4 + i) in the form a + bi.

Respuesta :

jimrgrant1 jimrgrant1
  • 02-10-2020

Answer:

54 + 39i

Step-by-step explanation:

Given

3i(2 - 5i)(4 + i) ← expand factors using FOIL

= 3i(8 - 18i - 5i² ) → using i² = - 1

= 3i(13 - 18i) ← distribute parenthesis by 3i

= 39i - 54i²

= 54 + 39i

Answer Link

Otras preguntas

Which of the following best describes a similarity between the Inca and Aztec empires during the postclassical era? A. Both empires developed societies based on
The kidneys remove which cellular waste product from blood? a. undigested food materials b. carbon dioxide c. urea d. oxygen
why was the radical Republican plan for Reconstruction considered radical?
How do I find the value of K?
What's number is 35% of 20
where is Venezuela's most populous area
fortified area of a town or city
The goals of biodiversity conservation include all of the following EXCEPT (1 point) protecting individual species. introducing exotic species into new environm
How are industrial goods different from consumer goods?
What are the products of mitosis in animals? a. several identical gametes b. sperm and egg cells c. four identical daughter cells d. two identical daughter c