1.

Simplify: \[{{\left[ 2{{x}^{2}}-\frac{1}{400}{{y}^{2}} \right]}^{2}}-{{\left[ 2{{x}^{2}}+\frac{1}{400}{{y}^{2}} \right]}^{2}}\]

A.  \[-\frac{{{x}^{2}}{{y}^{2}}}{40}\]
B.  \[-\frac{{{x}^{2}}{{y}^{2}}}{50}\]      
C.  \[\frac{xy}{50}\] 
D.      \[-\frac{{{x}^{2}}{{y}^{2}}}{5}\]        
Answer» C.  \[\frac{xy}{50}\] 


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