The product is
and sum is a minimum.
Let the two numbers are
and
.
The product of two numbers is
.

Let the sum of two numbers is
.
Substitute
in
.


Differentiate on each side with respect to
.


Power rule of derivative :
.


Equate the derivative function to zero.
\



Substitute
in
.
.
The two numbers are
and
.
The two numbers are
and
.