Question 799030
sides l and w
l*w=728 (1)
l=4w+4 {2)
subst for l in (1)
w*(4w+4)=728
{{{ w^2 + w - 182 = 0 }}}
{{{ w = (-1 +-sqrt(1+4*182))/2 }}}
{{{ w = (-1 +-sqrt(729))/2 = (-1 +- 27)/2 }}}
Real solution w=13 in and l=56 in
Check: 13*56 = 728