Question 872155
x and y dimensions;
{{{xy=36}}} and {{{2x+2y=40}}}.


{{{x+y=20}}};
{{{y=20-x}}}.
{{{x(20-x)=36}}}
{{{20x-x^2=36}}}
{{{-x^2+20x-36=0}}}
{{{x^2-20x+36=0}}}
{{{(x-2)(x-18)=0}}}
Can you do the rest?