1.

If \[\mathbf{x=}\frac{\sqrt{\mathbf{2}}\mathbf{+}\sqrt{\mathbf{1}}}{\sqrt{\mathbf{2}}\mathbf{-}\sqrt{\mathbf{1}}}\] and \[y\mathbf{=}\frac{\sqrt{\mathbf{2}}-\sqrt{\mathbf{1}}}{\sqrt{\mathbf{2}}+\sqrt{\mathbf{1}}}\], find the value of \[{{\mathbf{x}}^{\mathbf{2}}}\mathbf{-}{{\mathbf{y}}^{\mathbf{2}}}\]

A.  96                               
B.  34   
C.  10                               
D.  \[2\sqrt{2}\]
Answer» C.  10                               


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