Koljeg
Koljeg
16-07-2014
Mathematics
contestada
(2+7i)(2-7i)= ==========
Respuesta :
Ryan2
Ryan2
16-07-2014
[tex](2+7i)(2-7i)=4-14i+14i-49i^2\\ \\ 4+49=53[/tex]
Answer Link
Аноним
Аноним
16-07-2014
[tex](2+7i)(2-7i)=2^2-(7i)^2=4-49\vfot(-1)=4+49=53\\\\-------------------------------\\i=\sqrt{-1}\\\\i^2=-1[/tex]
Answer Link
VER TODAS LAS RESPUESTAS ( 29+ )
Otras preguntas
At the store, there are 13 gallons of milk. Each gallon contains 128 fluid ounces. What is the total number of fluid ounces in 13 gallons? A.141 B.522 C.1,6
Which statement is true about the box plots?
Jules owns a square plot of land that measures 30 yards on each side. He plans to divide the land in half by building a fence, as shown by the dotted line belo
Which of the following men was NOT a famous rocket scientist?Wernher von Braun Alan Shepard Robert Goddard Sergey Korolyvo
Tell me whether an object’s surface area has increased or decreased if the size of the object is changed by a factor of 1/3??? PLEASE HELP ME WITH THIS MATH PRO
As population density , competition increases.
A Paco y Juan _________ falta el trabajo. (3 points) le les te me
Which statement best describes the significance of the Magna Carta? A. It took all war-making power out of the king's hands and gave it to Parliament. B.
how do you spell supercalifragilisticexpialidocious
Carla is riding a motorcycle across the country. After 4 hours, she is 600 miles from Denver. After 8 hours, she is 320 miles from Denver. What is the total dis
