\(\sqrt(12.5(12.5-8)(12.5-10)(12.5-7))\)
\(\sqrt(12.5(4.5)(12.5-10)(12.5-7))\)
\(\sqrt(12.5(4.5)(2.5)(12.5-7))\)
\(\sqrt(12.5(4.5)(2.5)(5.5))\)
\(\sqrt(56.25(2.5)(5.5))\)
\(\sqrt(140.625(5.5))\)
\(\sqrt(773.4375)\)
\(27.8107443266087361 & -27.8107443266087361\)
.