Question

giúp mik với ạ!!

Answer 1

-20/3

Answer 2

\(\dfrac{5^{12}.3^9-5^{11}.3^{11}}{5^{10}.3^{10}}=\dfrac{5^{11}.3^9\left(5-3^2\right)}{5^{10}.3^{10}}=\dfrac{5.\left(-4\right)}{3}=\dfrac{-20}{3}\)

Answer 3

\(\dfrac{-20}{3}\)

Answer 4

\(\dfrac{20}{3}\)