Question

Поможіть, терміново, дам 28 балів..

Answer 1

теорема Виетта:
$\left \{ {{x_1*x_2=\frac{c}{a}=\frac{-8}{1}=-8} \atop {x_1+x_2=-\frac{b}{a}=-\frac{b}{1}=-b}} \right. \\\\ \left \{ {{x_1*4=-8} \atop {x_1+4=-b}} \right. \\\\ \left \{ {{x_1=-2} \atop {-2+4=-b}} \right. \\\\ \left \{ {{x_1=-2} \atop {2=-b}} \right. \\\\ \left \{ {{x_1=-2} \atop {b=-2}} \right.$