Question

$25x {}^{2} + 30x + 7 = 0$
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Answer 1

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$25x {}^{2} + 3x + 7 = 0 \\ x = \frac{ - b + \sqrt{b {}^{2} - 4ac } }{2a} \\ \\ x = \frac{ - 3 + \sqrt{3 {}^{2} - 4(25)(7)} }{2(25)} \\ x = \frac{ - 3 + \sqrt{ - 691} }{50}$