The Quadratic Formula

1. Solve for \(x\). Enter the solutions from least to greatest.

\(4 x^{2}+40 x+84=0\)

2. Solve for \(x\).

\(4 x^{2}-48 x+144=0\)

3. Solve for \(x\). Enter the solutions from least to greatest.

\(5 x^{2}-20 x+15=0\)

4. Solve for \(x\).

\(3 x^{2}-54 x+243=0\)