Question 923625
Garden measures m by n.  The length and width increase by k; the area is now double the original area.  Find  k.


Area original, {{{mn}}}.

New area {{{(m+k)(n+k)}}}.

New is double of old.
{{{highlight((m+k)(n+k)=2mn)}}}
That will be a quadratic equation in k.  Solve for k.