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

Of the following, who was not a composer? A. Machaut B. Perotin C. Leonin D. Charlemagne

Which of these did not happen as a result of the crusades?

Which dimensions can create more than one triangle? A. Three angles measuring 75°,45°, and 60°. B. 3 sides measuring 7, 10, 12? C. Three angles measuring 40,50,

Which are examples of the discrimination that European Jews endured throughout history? Check all that apply.

Volcanoes emit much hydrogen sulfide gas, h2s, which reacts with the oxygen in the air to form water and sulfur dioxide, so2. every 72 tons of h2s reacts with 1

Neptune is approximately 4.5 billion kilometers from the sun. What is this distance in AU? 0.3 AU 3.8 AU 30 AU 3 million AU

How much is 1.3 million pesos in US dollars

What is the process called when molecules must join with another molecule, such as a protein, to get through a membrane?

Write an inequality for the sentence. t is less than three. t < 3 t ≥ 3 t > 3 t ≤ 3

Describe how geography has impacted two different civiliztions development.