Question

7x2+6x-4=0

pfv me ajudem

Answer 1

Resposta:

a=7 b=6 c=-4

$x = \frac{ - 6 + - \sqrt{ {6}^{2} - 4 \times 7 \times ( - 4) } }{2 \times 7} \\ \\ x = \frac{ - 6 + - \sqrt{ 36 + 112)} }{14} \\ \\ x = \frac{ - 6 + - \sqrt{148} }{14} \\ \\ x = \frac{ - 6 + - 2 \sqrt{37} }{14} \\ \\ x {}^{1} = \frac{ - 6 + 2 \sqrt{37} }{14} \\ \\ x {}^{2} = \frac{ - 6 - 2 \sqrt{37} }{14}$