Solve step by step please

Find three linearly independent solutions of the 3rd-order linear homogeneous differential equation y" - 3y' - 24y - 28y = 0 The linearly independent solutions are y1 = 12 = 13 = and the general solution of the equation is y (x) = where C1, 2, and c3 are arbitrary constants. ( Note: If m11, m2 and ms are three solutions of the auxiliary (characteristic) equation such that my