foxpower0519 foxpower0519

04-05-2020
Mathematics

contestada

When you multiply (3+6i)(3+7i) you get an answer of the form a+bi. Find a.

Respuesta :

OfficialRoytriever OfficialRoytriever

04-05-2020

(3 + 6i)(3 + 7i)

FOIL: First, Outside, Inside, and Last

3 x 3 = 9

3 x 7i = 21i

6i x 3 = 18i

6i x 71= 42i

9 + 21I + 18I + 42I = 9 + 81I

a = 9

B = 81I

Answer Link

Otras preguntas

Need help drawing a picture to show 9/7

When you sneeze, the air in your lungs accelerates from rest to approximately 150km/h in about 0.50 seconds. What is the acceleration, in units of g?

An oil tanker empties at 3.5 gallons per minute. Convert this rate to cups per second. Round to the nearest tenth.

what is 2,852.1 rounded to the nearest tenths

What is 9 divided by 160

what is 7 5/9 minus 3/ 2/15

What does "chaque semaine" mean in English?

Write an integer to represent the final temperature. The day started out at 6 am as 32 degrees rose 24 degrees by noon and dropped 14 degrees at 6 pm

The study of the natural processes that occur in the environment on humans affect them is called

What is 9 divided by 160