gaucekatinna
gaucekatinna gaucekatinna
  • 08-08-2016
  • Mathematics
contestada

Prove that (a-b) x (a+b)=2a x b is true. (a and b are vectors)

Respuesta :

Hussain514 Hussain514
  • 12-08-2016
(a-b)*(a+b)= a*a + a*b - b*a - b*b 

as

a*a = 0 and b*b = 0 



-b*a=a*b then 

(a-b)*(a+b) = a*b +a*b = 2(a*b) 
Answer Link

Otras preguntas

A parasite is a type of I think its d just making sure A. detritivore. B. filter feeder. C. carnivore. D. symbiont.
Why was MLK thrown in jail?
Many different feedback mechanisms have evolved over time. These mechanisms allow an organism to respond to changes in both its internal and external environmen
Find the value of X.
How many complex roots does 2x4 + 3x3 â x2 + 5 = 0 have?
Repel ent is spelled repellent true or false
A copy machine can duplicate 2400 copies in one hour. How many copies can it make per minute?
which types of essays are most likely to be written in first-person point of view
Based on your knowledge of the suffix -ion, which of the following is a synonym of abolition? to remove, removal, removed.
Explain the functional differences between the State Board of Nursing and the American Nurses Association (ANA).