Resposta :
[tex]a {}^{3} b - b {}^{2} \\3 {}^{3} \: . \: 2 - 2 {}^{2} \\ 27 \: . \: 2 - 4 \\ 54 - 4 \\ \boxed{\boxed{\boxed{50}}} \\ [/tex]
atte. yrz
[tex]a {}^{3} b - b {}^{2} \\3 {}^{3} \: . \: 2 - 2 {}^{2} \\ 27 \: . \: 2 - 4 \\ 54 - 4 \\ \boxed{\boxed{\boxed{50}}} \\ [/tex]
atte. yrz