Question

Qual o Resultado de ×2-4×-12=0

Answer 1

$x {}^{2} - 4x - 12 = 0$
$x {}^{2} + 2x - 6x - 12 = 0$
$x \times (x + 2) - 6(x + 2) = 0$
$(x + 2) \times (x - 6) = 0$
$x + 2 = 0$
$x - 6 = 0$
$x = - 2$
$x = 6$
$x1 = - 2$
$x2 = 6$