4 x square + 7 x + 2 is equal to zero

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$4x^2 + 7x + 2 = 0$

$x = {-7 \pm \sqrt{7^2-4.4.2} \over 2.4}$

$x = {-7 \pm \sqrt{49- 32} \over 8}$

$x = \frac{-7 ± √17}{8}$