Question

В уравнении x2-7x+q=0, x1=13. Найти x2 и q

Answer 1

$x^{2} -7x+q=0\\\\x_{1}+x_{2}=7\\\\x_{1}=13\\\\x_{2}=7-x_{1}=7-13=-6\\\\x_{1}*x_{2}=q\\\\q=13*(-6)=-78\\\\Otvet:\boxed{x_{2}=-6;q=-78}$