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

PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!! Multiply. √2 ⋅ √5 ⋅ √11

the total cost c a painter charges to paint a house depends on the number h of hours its takes to paint the house. this situation can be represented by the func

what is the radius of a circle with circumference 13 ft

Use the given information to find the lengths of the other two sides of the right triangle if side a is opposite angle A, side b is opposite angle B, and side c

Samir volunteered in a psychology study of emotion. If Samir were injected with ________, he would experience feelings of arousal.

What is the estimate of 19.7-6.9

What is the most common symptoms of a foodborne illness

find the quotient: -10/19 divided by (-5/7) ?

Solve the literal equation |ax+b|=c for x.

A taxi cab cab $1.75 for the first mile and $0.75 for each additional mile. You have $20 to spend on your ride. Which inequality could be solved to find how man