Show that x = – 2 is a solution of 3x2 + 13x + 14 = 0.
To be solution of the equation x = – 2 should satisfy the given equation
L.H.S 3x (– 2)2 + 13 x – 2 + 14
⇒ 12 – 26 + 14 = 0 = R.H.S
Hence x = – 2 is the solution of the equation.