Question

Por favor me ajudem..preciso dos cálculos

Answer 1

$\sqrt{- 1^{2}+ (\frac{5}{4}) ^{2} }$

$\sqrt{-1+ \frac{25}{16} } =\ \textgreater \ \sqrt{ \frac{-16+25}{16}} =\ \textgreater \ \sqrt{ \frac{9}{16} } =\ \textgreater \ \frac{3}{4}$