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

A packet of sweets costs $2.25. Felipe and his brother share the cost in the ratio 5:4. How much does Felipe pay?

What are some of the ways in which people learn culture?

How were slaves able to preserve their African culture 1 African slaves used their democratic principles to help establish colonial governments. 2 African slave

When did the Lugals begin to appear

what does Disinterested mean?

Find the value of c+8 when c=19

Plz help Provide a example of what you got out of the text MANABOZHO, THE MISCHIEF-MAKER Adapted from H. R. Schoolcraft There was never in the whole world a mor

If m=-3 and n=2 find the value of mn

What instrument do we normally use in our labs at school to observe microscopic things?

The equation represents a chemical reaction that occurs in living cells. How many atoms are represented in the reactants of this equation? *