Question

.......Срочно.........!

Answer 1

$(t^2+8t)^2+19(t^2+8t)+84=0$;
$a=(t^2+8t)$;
$a^2+19a+84=0$;
$D=19^2-4*84=5^2$;
$a_1=-12; a_2=-7;$; 
$(t^2+8t)=-12; t^2+8t+12=0; D=4; t_1=-2;t_2=-6;$
Или
$(t^2+8t)=-7; t^2+8t+7=0; D=6; t_1=-1;t_2=-7;$;
Ответ:-2;-6;-1;-7.