Question

Is x = - 3 a solution of the equation $2x^2-7x+9=0$?

Answer 1

Step : Finding the solution of equation $2x^2-7x+9=0$:

For x = -3 to be solution of the given quadratic equation it should satisfy the given equation,

$2x^2-7x+9=0$

Substituting x =-3 in the given equation,
We get,

$L.H.S={2(-3)}^2-7(-3)+9$

$=18+21+9$

$=48$

$\ne R.H.S$

Hence, x = -3 is not a solutioin of the given quadratic equation $2x^2-7x+9=0$