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Quadratic Formula for Finding Roots

If a x2+b x+c...

Question

If $a x^{2} + b x + c = 0$ , then x =

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None of these

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Solution

The correct option is C

Try making perfect square the given equation by adding and subtracting $\frac{b^{2}}{4 a^{2}}$
on solving it we'll find
$x = \frac{- b \pm \sqrt{b^{2} - 4 a c}}{2 a}$

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Similar questions

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II. \sqrt{a x^{2} + b x + c} = t x \pm \sqrt{c}

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III. \sqrt{a x^{2} + b x + c} = (x - a) t \pm x

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