Eliminate the arbitrary constants (1) y = (C1 + Czx)e-* + 2x - 4 x2 (2) y = 3 X 1 (3) y = x 2(c1 sin x + C2 Cos x) + 4x + 8 (4) x = c, cos wt + czwt; w is a parameter not to be eliminated (5) cx2 + x + y2 = 0