# Solve the equations and inequalities. Write the solution sets to the inequalities in interval notation. (x^{2}−9)^{2}−2(x^{2}−9)−35=0

Equations and inequalities
Solve the equations and inequalities. Write the solution sets to the inequalities in interval notation. $$\displaystyle{\left({x}^{{{2}}}−{9}\right)}^{{{2}}}−{2}{\left({x}^{{{2}}}−{9}\right)}−{35}={0}$$
$$\displaystyle{x}^{{{4}}}−{20}{x}^{{{2}}}+{64}$$