Rewrite the equation as .
Subtract from both sides of the equation.
Divide each term by and simplify.
Divide each term in by .
Cancel the common factor of .
Cancel the common factor.
Divide by .
Move the negative in front of the fraction.
The minimum and maximum cannot be determined because this is not a quadratic function.
Not a Quadratic Function
Find the Maximum/Minimum Value z=7x+9y