tolong jwb langsung cara nya

6. ( 2√2 - √6) (√2 + √6)
= 2.2 + 2√12 - √12 - 6
= 4 - 6 + √12
= -2 + 2√3
= 2 (√3 - 1) (C)

7. 3√27 + 2√48 - 6√12
= 3√9x3 + 2√16x3 - 6√4x3
= 3.3√3 + 2.4√3 - 6.2√3
= 9√3 + 8√3 - 12√3
= 5√3 (A)

Semoga membantu ^_^