Question

Помогите решить уравнение

x^2 - 5x - 6 =0

Answer 1

$d = 25 + 24 = \sqrt{49 } = 7 \\ x1 = 5 + 7 = 12 \div 2 = 6 \\ x2 = 5 - 7 = - 2 \div 2 = - 1$

Answer 2

x^2-5x-6=0

За теоремой Виета

$\left \{ {{x1+x2=5} \atop {x1*x2=-6 }} \right.$ ⇒$\left \{ {{x1=6} \atop {x2=-1}} \right.$