Find the value of $a$ for given quadratic equation by comparing with standard form $(a x^{2} + b x + c)$ .
$x^{2} - x - 3 = 0$

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Solution

The correct option is D $1$
Compare $a x^{2} + b x + c = 0$ with $x^{2} - x - 3 = 0$

thus, $a = 1, b = - 1 a n d c = - 3$

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