Solve the Equation by the Zero-Factor Property $$x ^ { 2 } + 14 x + 40 = 0$$

Multiple Choice

Solve the equation by the zero-factor property.
- $$x ^ { 2 } + 14 x + 40 = 0$$

A) $\{ 2 \sqrt { 10 } , - 2 \sqrt { 10 } \}$
B) $\{ - 20 , - 8 \}$
C) $\{ - 10 , - 4 \}$
D) $\{ 4,10 \}$