Gan tolong jawabannya​

Jawaban:

1.6√15-4√15-9√15-6√15

-13√15

2. 5/√6 × √6/√6 = 5√6/6

3.(2√2 × 4+√3 )/(4-√3 × 4+√3)

(8√2+2√6)/16-3

(8√2+2√6)/13

4. (2+√2 × 2+√3)/(2-√3 × 2+√3)

(4+2√3 +2√2+√6)/ 4-3

4+2√3 +2√2+√6