Phân tích ra bình thường pạn ạ

5.4^15.9^9-4.3^20.8^9

5.2^9.6^19-7.2^29.27^6

       = 5.2^30.3^18-2^2.3^20.2^27

          5.2^9.2^19.3^19-7.2^29.3^18

       = 2^29.3^18(5.2-3^2)

          2^28.3^18(5.3-7.2)

       = 2^29.3^18

          2^28.3^18

       =2

Cái 4^15=2^30 là 4^15=(2^2)^15= 4^15

Những cái sau Tương tự pạn nhé

\(B=\frac{5.4^{15}.9^9-4.3^{20}.8^9}{5.2^9.6^{19}-7.2^{29}.27^6}\)

   \(=\frac{5.2^{30}.3^{18}-2^2.3^{20}.2^{27}}{5.2^9.2^{19}.3^{19}-7.2^{29}.3^{18}}\)

   \(=\frac{2^{29}.3^{18}\left(5.2-3^2\right)}{2^{28}.3^{18}\left(5.3-7.2\right)}\)

   \(=\frac{2^{29}.3^{18}.1}{2^{28}.3^{18}.1}\)

   \(=2\)

\(\frac{5.4^{15}.9-4.3^{20}.8^9}{5.2^9.6^{19}-7.2^{29}.27^6}\)

= 1

đúng không ?

\(\frac{5.4^{15}.9^9-4.3^{20}.8^9}{5.2^9.6^{19}-7.2^{29}.27^6}\)\(=\frac{5.2^{30}.3^{18}-2^2.3^{20}.2^{27}}{5.2^9.2^{19}.3^{19}-7.2^{29}.3^{18}}\)\(=\frac{5.2^{30}.3^{18}-2^{29}.3^{20}}{5.2^{28}.3^{19}-7.2^{29}.3^{18}}\)\(=\frac{2^{29}.3^{18}\left(5.2-3^2\right)}{2^{28}.3^{18}\left(5.3-7.2\right)}=\frac{2.1}{1}=2\)

học tốt ~~~

\(\frac{5\cdot4^{15}\cdot9^9-4\cdot3^{20}\cdot8^9}{5\cdot2^9\cdot6^{19}-7\cdot2^{29}\cdot27^6}\\ =2\)