Question

Let u = <3, -1>, v = <-6, -6>. Find 9u + 2v.

Answer 1

\(\large \begin{cases}
9\cdot <a,b>\to <9\cdot a,9\cdot b>\\
2\cdot <a,b>\to <2\cdot a,2\cdot b>\\
\hline\\
<a,b>+<c,d>\to <a+c, b+d>
\end{cases}\)

Answer 2

<27, -9> +<-12,-12>
<15,-21>
Is that right?

Answer 3

<15,-21> \(\huge \checkmark\)