[tex]f(3) = 3 - 8 = - 5[/tex]

[tex]f(2) = 2 {}^{2} = 4[/tex]

[tex]f( - 2) = ( - 2) {}^{2} = 4[/tex]

[tex]f( - 3) = ( - 3) {}^{2} = 9[/tex]

[tex]f( - 3.1) = 4[/tex]