After applying variation of parameters to y " -2y + y = (1+22) . the following equations are obtained (x) er + C2 (x) zel = 0 9 (x) e + 2 (x) (2 + 1)e = ( 1+2 2 ) What are C1(x) and c2(x)? O ci (x) = -2In(22 + 1) C2 (x) = sin (x) O Ci (a) = -2In(202 + 1) C2 (x) = tan (x) o c1 (a) = tan (x) 2 (z) = -_In(x2 + 1) O ci (x) = 2 In(x2 + 1) C2 (a) = tan (x)