y = Ax + B
y' = A
y'' = 0
y'' + 2y' + 5y = 2x + 5
0 + 2A + 5 * (Ax + B ) = 2x + 5
5A * x + (2A + 5B) = 2x + 5
5A = 2 => A = 2/5
2A + 5B = 5 => 4/5 + 5B = 5 => 5B = 5 - 4/5 = 21/5 => B = 21/25
y = 2/5 * x + 21/25