ax2-kx+81=0 for what value of k the equation has equal rootsx square a x square a x square a x square
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Answer: The answer is
Step-by-step explanation: Given that the following quadratic equation has equal roots.
We need to find the value of 'k' for which the above equation has equal roots. We know that a quadratic equation has equal roots if its discriminant is zero.
Here, discriminant is given by
Therefore, for equal roots, we must have
Thus, the required value of k is
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