rayneelangley rayneelangley

24-07-2020
Mathematics

contestada

Perform the indicated operation and write the result in standard form: (-3+2i)(-3-7i)
A. -5+27i
B. 23+15i
C. -5+15i
D. 23-15i
E-5-27I

Respuesta :

Mrapplestime Mrapplestime

24-07-2020

Answer:

23+15i

Step-by-step explanation:

(-3+2i) (-3-7i)

multiply -3 w (-3+2i) and multiply -7i w (-3+2i)

9-6i+21i-14i^2

combine like terms

9+15i-14i^2

i squared is equal to -1 so

9+15i-(14x-1)

9+14+15i

23+15i

hope this helps :)

Answer Link

Otras preguntas

im not a fan of k-pop but for someone sake i want to know who they are..plz help me

Exact solutions. X^2-5x-1=0

On a school trip, the ratio of teachers to pupils is 2:11. If there are 132 pupils, how on many teachers o are there? HELP PLEASE

What is the equation of the line that passes through point (4, 12) and has a y-intercept of —2?

KE acquired by a mass m in travelling a certain distance d starting from rest under the action of a constant force is directly proportional to mass. How??

There are 3 beakers each of which contains saline solution. Beaker A initially contains 3 liters of 10\% salt solution. Beaker B initially contains 2 liters of

All euros have a national image on the "heads" side and a common design on the "tails" side. Spinning a coin, unlike tossing it, may not give heads and tails wi

6. A new car has an MSRP of $29,999, and it comes with a premium package priced at $2500, a navigation package priced at $500, and a destination charge of $700.

Why is the weather so hard to predict?

Article Il of the Constitution defines the roles of the president and the vice president. the president and the legislative branch. the vice president and the l