Question

u=(2,-7,1) v =(-3,0,4) e w=(0,5,-8) calcule

3u-2v
2u+3v-5w

Answer 1

3u-2v = ( 6 , -21 , 3 ) - ( -6 , 0 , 8 ) = ( 12 , -21 , -5)
2u+3v-5w = ( 4 , -14 , 2 ) + ( -9 , 0 , 12 ) - ( 0 , 25 , -40) = ( -5 , -39 , 54)