bootylicious bootylicious
  • 21-09-2015
  • Mathematics
contestada

How to solve (-2-2i)(-4-3i)(7+8i)

Respuesta :

Boeing7478i
Boeing7478i Boeing7478i
  • 21-09-2015
Step 1-F.O.I.L.: (-2-2i)(-4-3i)
8+6i+8i+3i^2
We know i^2=-1, so...
8+14i-3
5+14i

Step 2-F.O.I.L. again: (5+14i)(7+8i)
35+40i+98i+112i^2
35+138i-112
-77+138i

Note: "F.O.I.L." stands for "First, Outer, Inner, Last". In other words, distribute the terms of the first binomial to the other, in that order. So, (5+14i)(7+8i) should be done as follows:

5*7=56
5*8i=40i
14i*7=98i
14i*8i=112i^2
Answer Link

Otras preguntas

which of the following is the primary aim of the parti quebecois? a. establishing Quebec as an independent country b. secession from Canada in order to becom
A sample of aluminum metal absorbs 8.32 J of heat, upon which the temperature of the sample increases from 23.2 degrees C to 30.5 degrees C. Since the specific
why are newtons second and third law important to everyday life?
can anyone help with this, very emergency! !
Could you please tell me the main idea about this poem? Thank you very much ------- The Body In Old Age It travels in ways unenvisaged Not vigorously along corr
What did Louis Braille do to lose his sight?
What special problems did the freedmen face immediately after the war? What efforts were made to help them?
Karangan menjelang hari kartini
What is an example of hubris in Romeo and Juliet? Please provide citation.
The male voice tends to be in a lower range than a female's voice because men have: a. shorter and fatter vestibular ligaments b. more air to push through the