1. (akar 5 -1)(akar 5 +3) 2. (akar 2 - akar 3)(akar 2- 3akar 3)

1. √(5-1) × (5+3) = √4×8 = √32 = 4√2
2. 2-3√6-√6+9 = 11 - 4√6

maaf klo salah..