Find values of x and y such that both fx(x,y) = 0 and fy(x,y) = 0.f(x,y) = 12xy - 4x - 4y + 9

A. x = 3, y = 3
B. x = , y = 
C. x = -3, y = -3
D. x = - , y = - 


Answer: B

Mathematics

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A.

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Mathematics