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

-5x is - 40 + 3x Find x

In the beginning, why was cotton so well suited for growing conditions in Georgia?

Write the formula for the volume of a cone V = Tr’h in terms of h to find the height h of a cone with volume V = 327 cm and radius r = 4 cm.

The racoon dog and the Japanese knotweed are both __________ species in Europe. A. native B. invasive C. migratory D. essential

Determine whether you will use a GCF or LCM to solve. Then solve. DO NOT USE PRIME FACTORIZATION! Vera is buying plates, bowls, and cups for a picnic. Plates co

Item 6 POSSIBLE POINTS: 8 The length of Chen's office is 15.5 feet and the width is 7.8 feet. Use the formula P = 2ℓ + 2w to find the perimeter of the office. E

Write 3.01 (the one repeating) as a mixed number in simplest form.

sin3A/sinA - cos3A/cosA = 2

Tyler’s math class found that it would take 2.5×108 dollar bills to cover a square mile area. The surface area of the United States is about 3.8×106 square mile

Definition of Inquality