For the recurrence relation an=3an−1−2an−2a_n = 3a_{n-1} - 2a_{n-2}an=3an−1−2an−2, what is the characteristic equation?
r2=3r−2r^2 = 3r - 2r2=3r−2
r2−3r+2=0r^2 - 3r + 2 = 0r2−3r+2=0
r2+3r+2=0r^2 + 3r + 2 = 0r2+3r+2=0
3r−2=03r - 2 = 03r−2=0