No 2 dan 3….tolong beri caranya juga ya​

2log5 = x
5log3 = y

6log225 =

= log225/log6

= 5log15x15/ log3x2

= (5log5 + 5log3) + 5log5 + 5log3/ 5log3 + 5log2

= 1 + y + 1 + y/y + 1/x

= 2y + 2/ xy + 1