Question 238582
x(111+x)=104,000
111x+x^2=104,000
x^2+111x-104,000=0
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
x=(-111+-sqrt[111^2-4*1*-104,000])/281
x=(-111+-sqrt[12,321+416,000])/2
x=(-111+-sqrt[428.321])/2
x=(-111+-654.46)/2
x=(-111+654.46)/2
x=543.46/2
x=272 miles is the length of the west border.
Proof:
272(111+272)=104,000
272*383=104,000
104,000~104,000