Question

Alguém ai sabe fazer?

É urgente é pra hj!

Answer 1

$a) (\frac{-4+27-25}{-9+8-1}: \frac{35}{35})^{ \frac{1}{2} }= (\frac{-2}{-2}: 1)^{ \frac{1}{2} }= (1:1)^{ \frac{1}{2} }= (1)^{ \frac{1}{2} }= \sqrt{1}=1$


$b) \frac{81-4+1}{1-4-27}. \frac{39}{15}=\frac{78}{-30}. \frac{39}{15}=-\frac{78}{30}. \frac{39}{15}= \frac{3042:2}{450:2}= \frac{1521:3}{225:3}=\frac{507}{75}$