math1818 math1818
  • 21-08-2017
  • Mathematics
contestada

7-4i divided by
2+i
how to solve it?

Respuesta :

Ilyes39
Ilyes39 Ilyes39
  • 22-08-2017
[tex] \frac{7-4i}{2+i} =\frac{(7-4i)(2-i)}{(2+i)(2-i)} = \frac{14-7i-8i+4i^2}{2^2 -i^2} \\\\ \frac{14-15i-4}{4+1} = \frac{10-15i}{5}= \frac{5(2-3i)}{5} \text{ because } i^2=-1.\\\\ =2-3i. [/tex]
Answer Link

Otras preguntas

What is the volume of this cube??
how did the Columbian Exchange negatively impact Native Americans
which of the following is NOT an element of the position thesis template
How did Roosevelt manage to aid Great Britain in 1939 and 1940 in various ways short of war?
on Caribbean islands with mountains the windward slopes facing the trade winds force air upward causing rainfall as a result areas immediately to the leeward of
Solve for x: 3x^2-5x=2
If 28% of a sum is $100.80, what is the sum? A. $360.00 B. $282.24 C. $277.78 D. $129.02
How can we protect our natural resources? write a paragraph giving your ideas
The common use of poll taxes to inhibit black voters in the South was outlawed by the?: A. Twenty-fourth Amendment. B. Civil Rights Act of 1964. C. Voting Right
How did the United States react to the Holocaust? Why did the United States not do more to save the Jews from the Nazi extermination campaign?