Question

Which of the following is a linear equation  2x² +8c 2x² +3 = 8 7x + 9 = 15 7x + 8​

Answer 1

Answer:

ICSE Class 10

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Sum

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 = 5 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.