Solve the Radical Equation, and Check All Proposed Solutions $$\sqrt { 28 x + 28 } = x + 8$$

Multiple Choice

Solve the radical equation, and check all proposed solutions.
- $$\sqrt { 28 x + 28 } = x + 8$$

A) $\{ - 6 \}$
B) $\{ 6 \}$
C) $\{ 7 \}$
D) $\{ - 5 \}$