## Differential Equations -A

Solutions of a second order differential linear and homogeneous equation with constant coefficients: a y” + b y’ + c y = 0 (a ≠ 0) Solve the characteristic equation: a r2 + b r + c = 0 with general solutions r1,2=[(-b±√b2-4ac )/2a]. 1> if Δ=b2-4ac > 0 then …