Question

Is x = –3 a solution of the quadratic equation 2x² – 7x + 9 = 0?

Answer 1

2x² – 7x + 9 = 0

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

So, substituting x = –3 in the given equation, we get

L.H.S = 2(–3)² – 7(–3) + 9

= 18 + 21 + 9    

= 48 

≠ R.H.S

Hence, x = –3 is not a solution of the quadratic equation 2x² – 7x + 9 = 0.