What is the critical f(x,y)=(9-x)(9-y)(x+y-9) ?

The critical f(x,y)=(9-x)(9-y)(x+y-9) is (9,0),(6,6)

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critical f(x,y)=(9-x)(9-y)(x+y-9)

critical points

f (x, y) = (9 - x) (9 - y) (x + y - 9)

(9, 0), (6, 6)

Solution steps

(9 - x) (9 - y) (x + y - 9)

Find where

\nabla f (x, y)

is equal to zero or undefined

(9, 0), (6, 6)

+ \frac{x}{3 x + 4}

f (x) = 8 ln (x) - x^{2}

f (x) = \frac{x ^{4}}{4} - \frac{x ^{3}}{3} - 3 x^{2} + 10

2 y - 2 y^{2} - 3 x y

f (r, s) = (5 r^{2} + 3 s^{3}) (2 r - 5 s)

What is the critical f(x,y)=(9-x)(9-y)(x+y-9) ?
The critical f(x,y)=(9-x)(9-y)(x+y-9) is (9,0),(6,6)