Question: For C(x,y) = 2x2 + 2xy + 3y2 - 16x - 18y + 54 find all values of x and y such that Cx(x,y) =

For
C(x,y) = 2x2 + 2xy + 3y2 - 16x - 18y + 54
find all values of x and y such that
Cx(x,y) = 0 and Cy(x,y) = 0
simultaneously.

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