so let's firstly find the component form of "u", keeping in mind that "v" is really in the opposite direction and twice as long, so v = -2u.
[tex]\bf \stackrel{u}{(15,22),(5,-4)}\implies \stackrel{\textit{\underline{u} component form}}{<~5-15~~,~~-4-22~>}\implies \stackrel{u}{<-10~,~-26>} \\\\\\ v=-2u\implies v=-2<-10~,~-26>\implies v=<20,52>[/tex]
