A=(-2+4/5)² qual valor de A?
[tex]A=\left(-2+ \dfrac{4}{5}\right)^2 \\ \\ \\ A=\left( \dfrac{-2*5+4}{5}\right)^2 \\ \\ \\ A=\left( \dfrac{-10+4}{5}\right)^2 \\ \\ \\ A=\left( \dfrac{-6}{5}\right)^2 \\ \\ \\ A=\left( \dfrac{(-6)^2}{(5)^2}\right) \\ \\ \\ \boxed{ A= \dfrac{36}{25} } \\ \\ \\ [/tex]
