Solve:
$y^{2} - 2 y - 99 = 0$

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Solution

Now,
$y^{2} - 2 y - 99 = 0$
or, $y^{2} - 11 y + 9 y - 99 = 0$
or, $(y - 11) (y + 9) = 0$
or, $y = 11, - 9$ .

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