Enter the correct remaining factor in the factorization below.

$\displaystyle{{x}}^{{2}}-{3}{x}+{10}{x}-{30}=\usepackage{cmbright}\Huge\$ (___) $\displaystyle{\left({x}+{10}\right)}\usepackage{cmbright}\Huge\$

Enter your answer in the form $\displaystyle{\left({x}+{a}\right)}\usepackage{cmbright}\Huge\$ , and do not enter spaces between symbols. For example, to enter the quantity $\displaystyle{\left({x}-{1}\right)}\usepackage{cmbright}\Huge\$ , write (x-1).