Find All Real Values of X Such That F (X) $f ( x ) = 4 x ^ { 2 } - 25$

Multiple Choice

Find all real values of x such that f (x) = 0. $f ( x ) = 4 x ^ { 2 } - 25$

A) $\pm \frac { 2 } { 5 }$
B) $\pm \frac { 5 } { 2 }$
C) $\pm \frac { 25 } { 4 }$
D) $- \frac { 25 } { 4 }$
E) $\frac { 5 } { 2 }$