The function is
.
Differentiate the function
partially with respect to
.

.
Equate
to zero.

Differentiate the function
partially with respect to
.
.
Equate
to zero.

Multiply equation (1) by 2.
\
Subtract equation (2) from equation (3).
\
Substitute
in equation (1).

The values are
and
.
The values are
and
.