Answer:
[tex]8.5m^{2}+ m -5[/tex]
Step-by-step explanation:
Since perimeter, [tex]P=19m^{2}+ 2m -10[/tex] and we know that P=2(l+w) then [tex]P=2(l+m^{2})=2l+2m^{2}[/tex]
The length will be [tex]2l=19m^{2}+ 2m -10-2m^{2}=17m^{2}+ 2m -10[/tex]
Now [tex]l=8.5m^{2}+ m -5[/tex]
