Question

x2 - 20x - 69=0 способом виета​

Answer 1

$x^2-20x-69=0\\\\\left \{ {{x_1+x_2=20} \atop {x_1*x_2=-69}} \right. => \left \{ {{x_1=-23} \atop {x_2=3}} \right.$

Проверка:

$(x-23)(x+3)=x^2-23x+3x-69=x^2-20x-69.$