Question

$4x^2 + 7 \times - 2 = 0$
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Answer 1

Ответ:

$4x {}^{2} + 7 \times ( - 2) = 0 \\ 4x {}^{2} - 14 = 0 \: \: | \div 2 \\ 2x {}^{2} - 7 = 0 \\ 2x {}^{2} = 7 \: \: \: | \div 2 \\ x {}^{2} = \frac{7}{2} \\ x = ± \frac{ \sqrt{14} }{2}$