Question 259568
1.{{{L^2+W^2=60^2}}}
{{{L=12+W}}}
{{{L^2=144+24W+W^2}}}
Substitute into eq. 1,
1.{{{L^2+W^2=3600}}}
{{{144+24W+W^2+W^2=3600}}}
{{{2W^2+24W-3456=0}}}
{{{W^2+12W-1728=0}}}
{{{(W-36)(W+48)=0}}}
{{{W-36=0}}}
{{{W=36}}}
Then,
{{{L=12+W=48}}}