Solve :
$5 x^{2} - 14 x + 9 = 0$

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Solution

$5 x^{2} - 14 x + 9 = 0$
$5 x^{2} - 5 x - 9 x + 9 = 0$
$5 x (x - 1) - 9 (x - 1) = 0$
$(x - 1) (5 x - 9) = 0$
$x = 1, \frac{9}{5}$

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