Question

5x
$5x + 4 {x}^{2} + 7x$
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Answer 1

Step-by-step explanation:

$hey \: mate \: your \: answer \: is \: here \\ 5x + 4x ^{2} + 7x = 0 \\4 {x}^{2} + 12x = 0 \\ 4 {x}^{2} = - 12x \\ {x}^{2} = - 3x \\ x = - \sqrt{ 3x} \\ \\ hope \: it \: and \: plzz \: mark \: it \: as \: brainliest$