Which of the following option is the standard form of the mentioned quadratic equation?
$7 - 4 x - x^{2} = 0$

x^{2} + 4 x - 7 = 0

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7 - 4 x + x^{2} = 0

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- 7 - x^{2} + 4 x = 0

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None of these

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Solution

The correct option is A $x^{2} + 4 x - 7 = 0$
Given equation is,
$7 - 4 x - x^{2} = 0$
Standard form of mentioned quadratic equation which will be in form of a general quadratic equation $a x^{2} + b x + c = 0$ is:
$x^{2} + 4 x - 7 = 0$

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x^{2} - 4 x + 7 = 0

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