In each of Problems 10 through 15, verify that the given functions y1 and y2 satisfy the corresponding homogeneous equation; then find a particular solution of the given nonhomogeneous equation. In Problems 14 and 15, g is an arbitrary continuous function.
10. t2y'' - 2y = 3t2 - 1, t > 0; y1(t) = t2, y2(t) = t-1
11. t2y'' - t(t + 2)y' + (t + 2)y = 2t3, t > 0; y1(t) = t, y2(t) = tet