Question

Gostaria de saber a numero 2 por favor. grata

Answer 1

$a = - \frac{1}{10}-----------b= \frac{1}{100}$

$\frac{ab-a^2}{ \sqrt{b} }= \frac{- \frac{1}{10}* \frac{1}{100}-(- \frac{1}{10})^2 }{ \sqrt{ \frac{1}{100} } }=$

$= \frac{- \frac{1}{1000}- \frac{1}{100} }{ \frac{1}{10} }= \frac{ \frac{-1-10}{1000} }{ \frac{1}{10} }= \frac{ \frac{-11}{1000} }{ \frac{1}{10} } =$

$=- \frac{11}{1000} : \frac{1}{10}=- \frac{11}{1000}* \frac{10}{1}=- \frac{11}{100}$