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Mathematics 11 Online
OpenStudy (chupacabraj):

Finding the local max and min of this multivariable function.

OpenStudy (chupacabraj):

\[f(x,y) = x^3 -12xy + 8y^3\]

OpenStudy (chupacabraj):

\[f_{xx}= 3x^2 -12y = 0\]

OpenStudy (chupacabraj):

\[f_{yy}= -12x + 24y^2 = 0\]

OpenStudy (chupacabraj):

I just don't know how to solve for x and y...

OpenStudy (chupacabraj):

I need to find the critical point(s).

OpenStudy (issimplcalcus):

What math are you in?

OpenStudy (chupacabraj):

calc 3, i just figured it out though

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