Question

3 raiz quadrada de 81 - raiz quadrada de 4

Answer 1

$3 \sqrt{81} - \sqrt{4} \\\\\\3 \times 9 - 2\\\\27-2\\\\25$

Forte abraço!

Answer 2

Resposta:

raiz quadrada de 81=9

raiz quadrada de 4=2

assim iremos subtrair:

9-2=7

x=7

abraço ;)