Expression 5: negative 2 left parenthesis, "x" , right parenthesis squared plus 2 greater than or equal to "y" greater than or equal to 2 left parenthesis, "x" , right parenthesis squared plus negative 2−2x2+2≥y≥2x2+−2
5
Expression 6: 2 left parenthesis, "x" minus 1 , right parenthesis squared plus negative 2 less than or equal to "y" less than or equal to negative 2 left parenthesis, "x" minus 1 , right parenthesis squared plus 2 left brace, , right brace2x−12+−2≤y≤−2x−12+2
6
Expression 7: 2 left parenthesis, "x" plus 1 , right parenthesis squared plus negative 2 less than or equal to "y" less than or equal to negative 2 left parenthesis, "x" plus 1 , right parenthesis squared plus 22x+12+−2≤y≤−2x+12+2
7
Expression 8: 2 left parenthesis, "x" plus 2 , right parenthesis squared plus negative 2 less than or equal to "y" less than or equal to negative 2 left parenthesis, "x" plus 1 , right parenthesis squared plus 22x+22+−2≤y≤−2x+12+2
8
Expression 9: 2 left parenthesis, "x" minus 2 , right parenthesis squared plus negative 2 less than or equal to "y" less than or equal to negative 2 left parenthesis, "x" minus 1 , right parenthesis squared plus 22x−22+−2≤y≤−2x−12+2