Question

Racionalize ㅤㅤㅤ15
ㅤㅤㅤㅤㅤㅤㅤㅤ-------
Expoente - - > 3 √7 e expoente 2​

Answer 1

Resposta:

$\frac{15}{3 {}^{3} ( \sqrt{ {7}^{2} }) } = \\ \frac{15}{9(7)} = \\ \frac{15 \div 3}{63 \div 3} = \\ \frac{5}{21}$