1.

Which of the following are the factors of \[\frac{{{x}^{2}}}{4}-\frac{{{y}^{2}}}{9}\]?

A.  \[\left( \frac{x}{4}+\frac{y}{9} \right)\] and \[\left( \frac{x}{4}-\frac{y}{9} \right)\]
B.  \[\left( \frac{x}{2}+\frac{y}{9} \right)\] and \[\left( \frac{x}{2}-\frac{y}{9} \right)\]
C.  \[\left( \frac{x}{2}+\frac{y}{3} \right)\]and \[\left( \frac{x}{2}-\frac{y}{3} \right)\]
D.  \[\left( \frac{x}{2}-\frac{y}{3} \right)\] and \[\left( \frac{x}{4}-\frac{y}{9} \right)\]
Answer» D.  \[\left( \frac{x}{2}-\frac{y}{3} \right)\] and \[\left( \frac{x}{4}-\frac{y}{9} \right)\]


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