1.

If x=5–√+15–√−1x=5+15−1 and y=5–√−15–√+1,y=5−15+1, then the value of x2+xy+y2x2−xy+y2x2+xy+y2x2−xy+y2 is?

A. 34343434343434343434334434
B. 53535353535353535353553353
C. 43434343434343434343443343
D. 35353535353535353535335535
Answer» B. 53535353535353535353553353


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