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

4. Bile salts from the gall bladder mix with fats to further break them down in a process called (Points : 2) A. enzymatic reaction. B. oxidation. C. emulsifica

Why did rivalries among European nations increases

explain how you know that when finding a fractional part of a whole number is the same as multiplying that fraction by a whole numbver

Which agreement called for the establishment of a permanent system that would ensure general security for all nations? A) Lend Lease Agreement B) Good Neighbor

9. Which one of the following choices would be an acceptable small meal for a person who is gluten intolerant?

what percent of 20 is 11

which is heaviest a bicycle a pencil a dog an elephant

The commander of the Confederate forces in Charleston was _____. P.G.T. Beauregard Robert E. Lee James Longstreet

What are recriprocals

4. Bile salts from the gall bladder mix with fats to further break them down in a process called (Points : 2) A. enzymatic reaction. B. oxidation. C. emulsifica