Draw the graph of $y = x^{2} + 2 x - 3$ and hence find the roots of $x^{2} - x - 6 = 0$ .

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Solution

$x^{2}$ $- x - 6 = 0$
$(x - 3) (x + 2) = 0$
$s o, x = 3 o r x = - 2$

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y = x^{2} + 2 x - 3

x^{2} - x - 6 = 0

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