Rationalize the Denominator $\frac { a \sqrt { x } - 3 } { a \sqrt { x } + 3 }$

Rationalize the denominator. Assume that all variables represent nonnegative numbers and that the denominator is not
zero.
- $\frac { a \sqrt { x } - 3 } { a \sqrt { x } + 3 }$

A) $\frac { a ^ { 2 } x - 6 a \sqrt { x } - 9 } { a ^ { 2 } x + 9 }$
B) $\frac { a ^ { 2 } x + 6 a \sqrt { x } - 9 } { a ^ { 2 } x - 9 }$
C) $\frac { a ^ { 2 } x - 6 a \sqrt { x } + 9 } { a ^ { 2 } x - 9 }$
D) $\frac { a ^ { 2 } x - 6 a \sqrt { x } + 9 } { a ^ { 2 } x + 9 }$

Correct Answer:

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