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

how do I figure out what 5550/1000
I would like to know if 200 cm is greater or less than 3 m
a gasoline pump delivers 4 2/5 gallons of gas per minute. how many minutes will it take to fill a gas tank that holds 16 1/2 gallons?
Why did the settlers go to new mexico during manifest destiny?
Why did the settlers go to new mexico during manifest destiny?
If A+B=76  and A -B=38 whats A divided by B
anita tosses 3 coins. what is the probability that all the coins will land tails up?
What is 10 percent of 80
How many quarts in 24 pints?
a rectangular field with a area of 8000m2 is enclosed by 400m of fencing. determine dimensions to nearest tenth of a metre