Correct. Evaluate the function for each input of x to find the output $\displaystyle{f{{\left({x}\right)}}}\usepackage{cmbright}\Huge\$ .

$\displaystyle{f{{\left({4}\right)}}}=-{2}+\sqrt{{{4}}}=-{2}+{2}={0}\usepackage{cmbright}\Huge\$

$\displaystyle{f{{\left({9}\right)}}}=-{2}+\sqrt{{{9}}}=-{2}+{3}={1}\usepackage{cmbright}\Huge\$

$\displaystyle{f{{\left({25}\right)}}}=-{2}+\sqrt{{{25}}}=-{2}+{5}={3}\usepackage{cmbright}\Huge\$