Using FOIL: $\displaystyle{\left({4}{x}-{1}\right)}{\left({x}+{6}\right)}={4}{{x}}^{{2}}+{24}{x}-{1}{x}-{6}={4}{{x}}^{{2}}+{23}{x}-{6}\usepackage{cmbright}\Huge\$

This is not equal to the given expression. The correct answer is: Cannot be factored.