Find the indicated maxima or minima.Minimum of f(x,y) = x2 + y2 - xy,subject to x - y = 10
A. 25 when x = 5, y = 5
B. 7 when x = 2, y = -1
C. 3 when x = 1, y = 2
D. 75 when x = 5, y = -5
Answer: D
Mathematics
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A. x = - 
, 
B. x = 
, - 
C. x = 
, - 
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