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

the mean of three numbers is 70. if two of the numbers are 55 and 65 what is the third number

what is payment for labor

How did Hinduism impact the Gupta Empire? WHOEVER GETS THIS RIGHT GETS BRAINLIEST!!

Philip Randolph was a well known civil rights leader. During the 1940s, his work was focused mainly on

Someone please help me asap !!

What does i decide what I wanted on my tombstone...A Teacher to the Last mean?

The section of the brain that processes integrates and distributes all sensory information,except olfactory, to the cerebral cortex is the ?

Troy worked for 3 hours and 15 minutes. How should he write that on his time card? A. 3.75 B. 3.25 C. 3.15 D. 3.5

Laura just got a new laptop but was unaware that it didn't come loaded with adobe reader. her boyfriend gives her access to his employee homepage and suggests t

I still don't understand plz help plz show work