Question

Let u = <-5, 1>, v = <7, -4>. Find 9u - 6v.

Answer 1

@amistre64

Answer 2

give me your best attempt

Answer 3

multiplication and addition are really elementary school operations that i believe you would be rather proficient at by now. so give it a shot and lets see how you do.

Answer 4

Oh now I remember how to do it. I'm a little rusty at this stuff since I'm just reviewing before my exam :)

Answer 5

:)

Answer 6

Got it. It's <-87, 33>

Answer 7

if it helps, vectors can be written as the sum of 2 vectors: the x and y vectors:

x = <1,0> and y=<0,1>

therefore:

<-5,1> can be written as the sum of x and y as: -5x+1y

Answer 8

then adding vectors is simply adding like parts, and scaling them is just ... distribution

Answer 9

Ok. Thanks. That acutally makes everything more simple

Answer 10

actually*

Answer 11

good luck :)