Question

calcule: a) O quadrado de 7 b) O cubo de 9 c) O quadrado de 21 d) O cubo de 5 e) O quadrado de 11 f) O cubo de 8​

Answer 1

$\Large\boxed{\begin{array}{l}\tt a)~\sf 7^2=7\cdot7=49\\\tt b)~\sf 9^3=9\cdot9\cdot9=729\\\tt c)~\sf 21^2=21\cdot21=441\\\tt d)~\sf 5^3=5\cdot5\cdot5=125\\\tt e)~\sf 11^2=11\cdot11=121\\\tt f)~\sf 8^3=8\cdot8\cdot8=512\end{array}}$