24-02-2017
Mathematics

contestada

For what value of "a" will the product show below have a purely imaginary value?(with work please)

(4+5i)(a+2i)

Respuesta :

Danielle129 Danielle129

24-02-2017

4 + 5 • i Or 1 = 9
a or 1 + 2 • i or 1 = 3
9 + 3 = 12
12 is the answer

Answer Link

Otras preguntas

selected officials The Zhou king ruled with the help of a(n) who carry out different government jobs. * Mandate of Heaven filial piety bureaucracy acupuncture

Which algebraic expression represents the sequence shown?4, 8, 12, 16, … A. 4n B. n + 4 C. 4n + 4 D. 4 (n-10)

In general, weathering tends to occur more rapidly in warm climates than in cool climates. How does this trend explain the effect of temperature on erosion rate

Describe the Encomienda system.

how can Magnets cause objects to have kinetic energy? SOMEONE PLZ HELP!!!! Lots of points

expand 4(q+4)? pls help :)

write a program that display your name c++

Anyone know this????

PLZ HELP ME! :) 50 PTS!

In the context of the passage as a whole, the first sentence of the third paragraph ("Yet ... can dom) marks the transition between A a brief summary of a debat