Question

calcule o valor da expressao: raiz de 81/4 menos raiz de 400 + raiz de 2,25?

Answer 1

$\sqrt{81/4}$  -  $\sqrt{400}$  + $\sqrt{2.25}$

9/2 - 20 + 1.5
4.5 -20 + 1.5
Resposta = -14