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Quadratic Equations

Given reason ...

Question

Given reason whether the following is an equation or not:
$(x - 2)^{2} = x^{2} - 4 x + 4$ .

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Solution

Given,
$\frac{d y}{d x} = \frac{2 x}{1 + x^{2}} - \frac{(- 2 x)}{1 - x^{2}}$ .
This is not an equation as it is an identity.

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