InterviewSolution
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InterviewSolution
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The graph of the polynomial f(x) = ax2 + box + c is as shown in fig.Write the value of b2 – 4ac and the number of real zeros of f(x). |
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Answer» b 2 – 4ac = 0, Two The given quadratic equation touches the x - axis at only one point. The root of the quadratic equation is equal and real because if the quadratic equation has two distinct roots, then the graph touches the x - axis at two points. As we know that the roots are real and equal if the value of discriminant is zero, So, b 2 – 4ac = 0 |
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