If x3 - y3 = 81 and x - y = 3, then what is the value of x2 + y2? – McqOptions

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1.	If x3 - y3 = 81 and x - y = 3, then what is the value of x2 + y2?
A.	18
B.	21
C.	27
D.	36
Answer» C. 27

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