Find the general solution to the homogeneous differential equation where double derivative - 20*single derivative + 116y = 0 The solution has the form y= C1f1(t) + C2f2(t) with f1(t) = ? and f2(t) = ?

Find the general solution to the homogeneous differential equation where double derivative - 20*single derivative + 116y = 0

The solution has the form

y= C1f1(t) + C2f2(t) with f1(t) = ? and f2(t) = ?