Question

5/4-²
O menos é com o 2 lá ensima

Answer 1

Expoente negativo

$\boxed{\boxed{\mathsf{{(\dfrac{a}{b})}^{-n}={(\dfrac{b}{a})}^{n}}}}$

$\mathsf{{(\dfrac{5}{4})}^{-2}={(\dfrac{4}{5})}^{2}}$

$\boxed{\boxed{\mathsf{{(\dfrac{5}{4})}^{-2}={(\dfrac{4}{5})}^{2}=\dfrac{16}{25}}}}$