Find the incomplete quadratic equation in $x$ , whose solutions are $2$ and $- 2$ .

x^{2} + 4 x = 0

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x^{2} + 4 = 0

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x^{2} - 4 = 0

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x^{3} + 4 = 0

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Solution

The correct option is C $x^{2} - 4 = 0$
The solution in the form of incomplete quadratic equation, $x =$ $\pm 2$
Squaring on both the sides, we get $x^{2} = (\pm 2^{2})$
$x^{2} = 4$
$x^{2} - 4 = 0$
Hence, option C is correct.

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