If x4 + x2y2 + y4 = 91, and x2 - xy + y2 = 13, then what is the value – McqOptions

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1.	If x4 + x2y2 + y4 = 91, and x2 - xy + y2 = 13, then what is the value of \|x - y\|?
A.	8
B.	6
C.	2
D.	4
Answer» E.

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