Expression 3: "a" cubed minus 16 "a" squared minus 57 "a" plus 1 tilde 0 left brace, negative 4 less than "a" less than negative 2 , right bracea3−16a2−57a+1~0−4<a<−2
3
Expression 4: "b" cubed minus 16 "b" squared minus 57 "b" plus 1 tilde 0 left brace, negative 1 less than "b" less than 1 , right braceb3−16b2−57b+1~0−1<b<1
4
Expression 5: "c" cubed minus 16 "c" squared minus 57 "c" plus 1 tilde 0 left brace, 18 less than "c" less than 20 , right bracec3−16c2−57c+1~018<c<20
