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Solving a Quadratic Equation by Completion of Squares Method

Find the zero...

Question

Find the zeros of following polynomial.
$p (x) = x^{2} - 1$

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Solution

$p (x) = x^{2} - 1 = 0$ $\Rightarrow (x + 1) (x - 1) = 0$
$\Rightarrow x + 1 = 0 a n d x - 1 = 0$
$\Rightarrow x = - 1 a n d x = 1$

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