91Ó°ÊÓ

List all possible rational roots for each equation. Then use the Rational Root Theorem to find each root. $$ 3 x^{3}-5 x^{2}-4 x+4=0 $$

List all possible rational roots for each equation. Then use the Rational Root Theorem to find each root. $$ 3 x^{3}+10 x^{2}-x-12=0 $$

Solve. Check for extraneous solutions. $$ \left(x^{2}-9\right)^{\frac{1}{2}}-x=-3 $$