Solve the Inequality $x ^ { 2 } + 7 x \leq - 3 x - 21$

Multiple Choice

Solve the inequality.
- $x ^ { 2 } + 7 x \leq - 3 x - 21$

A) $3 \leq x \leq 7$
B) $- 3 \leq x \leq - 7$
C) $x \leq - \frac { 1 } { 2 } \text { or } x \geq \frac { 3 } { 4 }$
D) $x \leq - 3 \text { or } x \geq - 7$