differential equation - Please state the method used and show the work required to obtain the answer.
solve the differential equation:
12y^"" + 46y^''' + 48y" - 11 y' -30y =0
Differential equation - Find the general solution of the differential equation: y'' + 2y' = 0
Differential equation - Find the general solution of the differential equation: y'' - y = 2/(e^x + 1)