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