Question

Let u = <7, -3>, v = <-9, 5>. Find 4u - 3v.

Answer 1

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Answer 2

vectors work similar like regular numbers, All you have to do is multiply everything in u by 4 and then subtract it by the stuff in v by 3

\[\Huge 4u=<28,-12>\]
\[\Huge 3v=<-27, 15>\]

\[\Large 4u-3v=<28-(-27), ~~~-12-(15)>=<55,-27>\]