Question

Let u = <-5, -9>, v = <6, 8>. Find -8u - 2v.

Answer 1

<52, 88>
<-8, 2>
<112, -28>
<28, 56>

Answer 2

\[u \in (-5,-9)\]\[v \in (6,8)\]
for fining the minimum of -8u - 2v we choose the smallest number of intervals.
-8*-5 - 2*6 =40-12=28
for fining the maximum of -8u - 2v we choose the largest number of intervals.
-8*-9 - 2*8 =72-16=56
so (28, 56) is the answer