Question

3.{[(6+7.√9):3²+(21-5.√4]}. me ajudem, por favor!!!!​

Answer 1

Resposta:

42

Explicação passo a passo:

$3 \cdot \{[(6+7\sqrt{9})\div3^2 + (21 - 5\sqrt{4})]\}=\\3 \cdot \{[(6+7 \cdot 3)\div3^2 + (21 - 5 \cdot 2)]\}=\\3 \cdot \{[(6+21)\div3^2 + (21 - 10)]\}=\\3 \cdot \{[(27)\div3^2 + 11]\}=\\3 \cdot \{[27 \div 9 + 11]\}=\\3 \cdot \{[3 + 11]\}=\\3 \cdot \{14\}=\\42$