Find the equation of the line L\displaystyle {L} that passes throught point P(8,1,5)\displaystyle {P}{\left(-{8},{1},{5}\right)} and Q(3,2,6)\displaystyle {Q}{\left({3},-{2},{6}\right)}.

r(t)=\displaystyle \vec{{{r}{\left({t}\right)}}}= +\displaystyle + t\displaystyle {t}