Question

sejam os vetores u =( -2, -3, -2) e v =(-1, -1, 5), o valor de (u + v). (u -v) é igual a

Answer 1

(-2+(-1),-3+(-1),-2+5). (-2-(-1),-3-(-1),-2-5)
(-3,-4,3) . (-1,-2,-7)
(3,8,-21)

Answer 2

u = (-2, -3, -2) e v = (-1,-1, 5)

( u + v ) . ( u - v) = 
( -3, -4, 3 ) . ( -1, -2, -7 ) = ( 3, 8, -21 )