### Find critical points and test for relative extrema.

List the critical points for which the second partials test fails. f(x,y)=x^3+y^3-6x^2+9y^2+12x+27y+19

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List the critical points for which the second partials test fails. f(x,y)=x^3+y^3-6x^2+9y^2+12x+27y+19

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