Nilai dr 7 log 4 . 2 log 5 + 7 log 49/25, adlah. . please jwb

7log4 * 2log5 + 7log49/25
= 7 log2² * 2log5 + 7log49 - 7log25
= 2* 7log2 * 2 log5 +2 - 7log25
= 2* 7log5 + 2 - 7 log25
= 7log5² + 2 - 7log25
= 7log25 + 2 - 7log25
= 2

semoga membantu :)