No 1, 2, 3 dong.... dengan caranya ya.... ☺️

1) (243²)^-1/5

= ( ( 3^5)²)^-1/5

= (3^10)^-1/5

= 3-²

= 1/3²

= 1/9 ( B )

2) 3√75 + 4√12 - 5√48
= 3•5√3 + 4•2√3 - 5•4√3
= 15√3 + 8√3 - 20√3
= 3√3 ( C )

3) ( 6 / √7 - 2) × ( √7 + 2 / √7 + 2 )

= 6 ( √7 + 2 )
------------------------------
( √7 - 2)(√7 + 2 )

= 6 ( √7 + 2 )
------------------------------
7 - 2√7 + 2√7 - 4

= 6 ( √7 + 2 )
--------------------
3

= 2( √7 + 2)

= 2√7 + 4 ( D )

Mohon best solution yah :)