Seudónimo Seudónimo

01-02-2016
Mathematics

contestada

(3-5i)(2+9i)+(7+2i)(7-2i)

Respuesta :

Benjamin16 Benjamin16

01-02-2016

[tex]i^{2} = -1[/tex]

-----------------------------------------

[tex](3-5i)(2+9i)+(7+2i)(7-2i) = \\ \\ = 6 + 27i - 10i - 45i^{2} + 49 - 14i + 14i - 4i^{2} = \\ \\ =55 + 17i + 45 + 4 = \boxed{104 + 17i} [/tex]

Answer Link

Otras preguntas

List the two traits of public goods and give an example of such a good

Celia is staring at the clock waiting for school to end so that she can go to track practice. She notices that the 4-inch-long minute hand is rotating around th

Construieste enunturi in care termenii de mai jos sa devina complemente: a. aproape: b. imagine: c. omului: d. adulmecand: e. Ion: f. aceia:

Show that 155 can be expressed as the sum of a power of 2 and a cube number?

How would you personify a map?

algebra trig 42 need help asap

Use the formula P = 2l + 2w. Find the perimeter of a rectangle with a length of 12.9 ft and a width of 19.3 ft. 64.4 ft 68.4 ft 66.7 ft 61.7 ft

The fight or flight response is triggered by the _________ nervous system. a. sympathetic b. synthetic c. gas d. parasympathetic

Which of the following has a higher probability of happening? Question 1 options: A) Flipping a heads and then a tails on a coin. B) Flipping a heads and then a

Which one of the five is least like the other four? inch mile acre yard foot?