Question 873702
{{{A+B=700}}}
{{{f=A*B}}}
{{{f=A(700-A)}}}
{{{f=700A-A^2}}}
Find df/dA.
{{{df/dA=700-2A}}}
Set it equal to zero to find the maximum.
{{{700-2A=0}}}
{{{2A=700}}}
{{{A=350}}}
{{{B=700-350}}}
{{{B=350}}}