Suppose m1 2 and m2 4 plusminus i are roots of multiplicit

Suppose m1 = 2 and m2 = -4 plusminus i are roots of multiplicity two and one. respectively, of an auxiliary equation. Write down the general solution of the corresponding homogeneous linear DE if in an equation with constant coefficients. a Cauchy-Euler equation. Solve the following IVP using any method discussed. d^2 y / dt^2 + 4y = 2t + 3, y(0) = 1, y\'(0) = 0