Đáp án+Giải thích các bước giải:
`(4^6 .9^5 + 6^9 ×120)/(8^4 .3^12 - 6^11)`
`=((2^2)^6 .(3^2)^5 + 2^9 . 3^9 .2^3 .3 .5)/((2^3)^4 .3^12 - 2^11 .3^11)`
`=(2^12 .3^10 +2^9 .3^9 .2^3 .3 .5)/(2^12 .3^12 -2^11 .3^11)`
`=(2^12 .3^10 +2^12 .3^10 .5)/(2^12 .3^12 -2^11 .3^11)`
`=(2^12 .3^10 .(5+1))/(2^11 .3^11 .(2.3 -1))`
`=2/3 . 6/5=4/5`