Jawabanmu

2014-08-28T18:46:39+07:00
1) = 4akar 9 - 6 akar 18 + 6 akar 18 - 9 akar 36
= 4.3 -9.6
=12-54
= -42

2) = 6 + akar 12 + 3 akar 12 + 9.2
=6 + 4 akar 12 + 18
=24 + 4 akar 12

semoga membantu
2014-08-28T18:48:33+07:00
1. (2√3+3√6)(2√3-3√6) =  4.3-6√18+6√18-9.6 = 12-54 = -42
2. (√6+3√2)(√6+3√2) = 6+3√12+3√12+3√12+9.2
= 6+9√12+18
= 6+18+9√12
= 24+9√12