

Critical points occur where the gradient is zero. This is guaranteed whenever

and either

or

.
The Hessian matrix for this function looks like

and has determinant

Maxima occur whenever the determinant is positive and

. Minima occur whenever both the determinant and

are positive. Saddle points occur whenever the determinant is negative.
At

, you have a saddle point since the determinant reduces to -324, so

is the saddle point.
At

, the determinant is

and

, so

is a local maximum.
No other critical points remain, so you're done.
Answer:
2.25, or 2 1/4.
Step-by-step explanation:
3/4 x 3 = 2.25
Answer:68
Step-by-step explanation:
Area of triangle=1/2×base×height
1632=1/2×48×h
1632×2=48×h
3264=48×h
3264/48=h
68=h
Area = Length x Width
A square has even sides so
576 = x^2
so find the square root of 576 and you have your answer