\[\boxed{\text{162.}\text{\ }\text{ОК\ ГДЗ\ -\ домашка\ на\ 5}}\]
\[1)\ a > 0;\ \ D > 0\]
\[a > 0;\ \ D = 0\]
\[a > 0;\ \ D < 0\]
\[2)\ a < 0;\ \ D > 0\]
\[a < 0;\ \ D = 0\]
\[a < 0;\ \ D < 0\]