Solve:
$x^{2} + 2 a x + (a^{2} - 1) = 0$

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Solution

Now,
$x^{2} + 2 a x + (a^{2} - 1) = 0$
or, $x^{2} + 2 a x + a^{2} = 1$
or, $(x + a)^{2} = 1$
or, $x = - a \pm 1$ .

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