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

Point in a titration at which the quantity of titrant is exactly sufficient for stoichiometric reaction with the analyte.

The total power input to a pumped storage power station is 600 MW The useful power output is 540 MW calculate the efficiency of this pumped storage power stati

30 PTS Why is the development of small motor skills so important during the preschool years?

Which area of the United States and Canada suffer most from acid rain, deforestation, chemical or nuclear toxic waste, and flooding?

Can somebody help me with this?

Starting with light energy, carbon dioxide, and water, which of the following sequences of biological steps explains how Usain Bolt was able to run the 100 mete

The motherboard is considered the "brain” of a computer because it controls a computer’s speed. performs specific tasks. connects a system’s components. pr

The study of sociology is based on which of the following premises?

domain and range pls

To measure the height of a building without a ruler or tape measure, an engineer drops a rock off the top of the building and finds out it takes 4.9 seconds for