Question

 rút gọn phấn số đó \(\frac{^{4^5.9^4-2.6^9}}{2^{10}.3^8+6^8.20}\)

Answer 1

\(\frac{4^5\times9^4-2\times6^9}{2^{10}\times3^8+6^8\times20}=\frac{2^{10}\times3^8-2\times2^9\times3^9}{2^{10}\times3^8+2^8\times3^8\times2^2\times5}\)

\(=\frac{2^{10}\times3^8-2^{10}\times3^9}{2^{10}\times3^8+2^{10}\times3^8\times5}=\frac{2^{10}\times3^8\left(1-3\right)}{2^{10}\times3^8\left(1+5\right)}\)

\(=\frac{-2}{6}=\frac{-1}{3}\)