Question

Rút gọn:

\(\dfrac{\left(-2\right)^3.9^3.5^5.7.8}{3^6.4^4.25^3.14}\)

Answer 1

\(=\dfrac{-1.3^2.7.8}{7.2}=-18\)

Answer 2

\(=\dfrac{\left(-2\right)^2.\left(-2\right).9.9.9.5^2.5^2.5.7.8}{3^2.3^2.3^2.4.4^2.25.25.25.14}=\dfrac{-2.5.7.8}{4^2.14}=\dfrac{-560}{224}=\dfrac{-5}{2}\)

Answer 3

\(\dfrac{\left(-2\right)^3.9^3.5^5.7.8}{3^6.4^4.25^3.14}=-\dfrac{2^3.\left(3^2\right)^3.5^5.7.2^3}{3^6.\left(2^2\right)^4.\left(5^2\right)^3.7.2}=-\dfrac{2^6.3^6.5^5.7}{2^9.3^6.5^6.7}=-\dfrac{1}{2^3.5}=-\dfrac{1}{40}\)