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

a + c + 2b = a + 2b + c property

Why does john quote shakespeare so often?

Hello is my answer right? I asked this question a while ago but to no avail, haha. I think it's the last one. Am I correct? THANK YOU!!!!!!

In order to avoid staying after work, a quality control analyst inspects the first 100 items produced that day. Which sampling method did she use? systemat

20 POINTS! As Khan and Jorman practice for college entrance tests, their scores increase. Khan’s current score is 750 and is rising 8 points per week. Jorman’

Match the US president to the correct description. Warren Harding Herbert Hoover Calvin Coolidge 1. Promised the nation a return to "normalcy", in th

PLZ HELP!!! will mark as brainiest According to the theory of Biological Evolution, all living things on earth are ____________. related different u

abraham lincoln thought secession was a)legal b)illegal c)patriotic d)benevolent

El señor _________ dentista. (2 points) Question 1 options: 1) está 2) es

What is a quick summary of Tom Sawyer in 1-2 paragraphs? No copying off the Internet, please!