Question

quanto dá a conta de 2 grau: a2+a-6=0?

Answer 1

$x = \frac{ - b + - \sqrt{ {b}^{2} - 4 \times a \times c} }{2 \times a}$

$x = \frac{ - 1 + - \sqrt{ {1}^{2} - 4 \times 1 \times ( - 6) } }{2 \times 1}$

$x = \frac{ - 1 + - \sqrt{1 + 24} }{2}$

$x = \frac{ - 1 + - \sqrt{25} }{2}$

$x = \frac{ - 1 + 5}{2}$

${x}^{1} = \frac{4}{2} \\ {x}^{1} = 2$

${x}^{2} = \frac{ - 1 - 5}{2}$

${x}^{2} = \frac{ - 6}{2} \\ {x}^{2} = - 3$

Espero ter ajudado!

dúvidas chama ae!

att Vinny