Solve the Problem $f ( x ) = x ^ { 2 } + 2 x + 10$

Multiple Choice

Solve the problem.
-Given $f ( x ) = x ^ { 2 } + 2 x + 10$ find all values for $x$ for which $f ( x ) \leq - 5$ .

A) $( - \infty , - 5 ] \cup [ 3 , \infty )$
B) $[ - 5,3 ]$
C) $( - 53 )$
D) $\varnothing$