Solve

y2y+10y=0,y(0)=1,y(0)=8\displaystyle {y}{''}-{2}{y}'+{10}{y}={0},\quad{y}{\left({0}\right)}={1},\quad{y}'{\left({0}\right)}=-{8}

y(t)\displaystyle {y}{\left({t}\right)} =  

The behavior of the solutions are: