Incorrect. First substitute each value of x into the polynomial. For example, when $\displaystyle{x}={1}\usepackage{cmbright}\Huge\$ , the polynomial equals $\displaystyle{{\left({1}\right)}}^{{3}}+{5}{{\left({1}\right)}}^{{2}}-{8}{\left({1}\right)}+{4}\usepackage{cmbright}\Huge\$ . Then simplify using the correct order of operations: exponents first, then multiplication, then addition and subtraction.