Question 1126420
{{{system(x+y=54,xy=560)}}}


{{{x(54-x)=560}}}



{{{-x^2+54x=560}}}

{{{-x^2+54x-560=0}}}

{{{x^2-54x+560=0}}}

discriminant  {{{54^2-4*560=676=26^2}}}

{{{x=(54+- 26)/2}}}

{{{x=27+- 13}}}

{{{system(x=14,or,x=40)}}}



In fact the dimensions should be  length 40 and width 14.


check:  14+40=54
and
14*40=560