[tex]a) \\ A = l {}^{2} \\ 36x {}^{2} y {}^{2} = l {}^{2} \\ l {}^{2} = 36x {}^{2} y {}^{2} \\ l = \sqrt{36x {}^{2}y {}^{2} } \\ \boxed{\boxed{\boxed{l = 6xy}}} \\ [/tex]
[tex]b) \\ \boxed{x = 1 \: \: e \: \: y = 2} \\ l = 6xy \\ l = 6 \: . \: 1 \: . \: 2 \\ l = 6 \: . \: 2 \\ \boxed{\boxed{\boxed{l = 12 \: u.m}}} \\ [/tex]
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[tex]a) \\ A = l {}^{2} \\ 36x {}^{2} y {}^{2} = l {}^{2} \\ l {}^{2} = 36x {}^{2} y {}^{2} \\ l = \sqrt{36x {}^{2}y {}^{2} } \\ \boxed{\boxed{\boxed{l = 6xy}}} \\ [/tex]
[tex]b) \\ \boxed{x = 1 \: \: e \: \: y = 2} \\ l = 6xy \\ l = 6 \: . \: 1 \: . \: 2 \\ l = 6 \: . \: 2 \\ \boxed{\boxed{\boxed{l = 12 \: u.m}}} \\ [/tex]
atte. yrz