Question

berenice pensou em dois numeros cuja soma e igual a -2 e o produto e -360. Quais sao esses numeros ?

Answer 1

$\left \{ {{x + y = -2} \atop {x . y = -360}} \right. \\ \\  \\ y = -2 -x \\ \\ x . y = -360 \\ x .(-2 -x) \\ -2x -x² +360 = 0 \\ x² +2x -360 = 0 \\ delta = 4 +1440 = 1444 \\ x = \frac{-2+38}{2} =18 \\ x = \frac{-2 -38}{2} = -20 \\ \\ y = -2 -x = -2 -18 = -20 \\ y = -2 -x = -2 +20 =18$