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
VER TODAS LAS RESPUESTAS ( 64+ )
Otras preguntas
Given the inequalities y > 5x-8 and y >3x+4, find the point that satisfies both inequalities
Kim estimates that the faucet in her kitchen drips at a rate for 1 drop every 2 seconds. Erik wants to klnow how many times the faucet drips in a week.
Given the inequalities y > 5x-8 and y >3x+4, find the point that satisfies one inequalities but not them all
Consider the following system of equations. y = 2x - 2 y - 2x = 5 What can you conclude about the system of equations? The system of equations is inconsistent.
Given the inequalities y > 5x-8 and y >3x+4, find the point that satisfies both inequalities
factoring 12m^2n^2-8mn+1=
A transformer has a primary coil with 600 turns and a secondary coil with 300 turns. If the output voltage is 320 volts, what is the input voltage?A. 8 volts
1. Why are there active volcanoes along the Pacific coast in Washington and Oregon but not along the East coast of the United States?
Any number that is divisible by 3 is also divisible by 9.Find a counterexample to show that the conjecture is false.18274548
Which statement is NOT true?A. If two coplanar lines do not intersect, then the lines are parallel.B. Two lines lie in one plane and do not intersect if and on
