1. √8×√18= √4.2 × √3.2 = √4√2 × √9√2 = 2√2 x 3√2 = 6.2 = 12
2. √75 - (√48√12) = √75 - (√16.3 √4.3) = √75- (4√3 x 2√3 = √75 - (8x3) = √25.3 - 24 = 5√3 - 24
4. (3√5-1)² = (3√5-1)(3√5-1) = 9.5 - 3√5 - 3√5 + 1 = 45 - 6√5 + 1 = 46 - 6√5

Jawabanmu

2014-01-27T08:11:27+07:00


4(.3√5-1)² =
(3√5-1)(3√5-1)
               = 9.5 - 3√5 - 3√5 + 1
               = 45 - 6√5 + 1
               = 46 - 6√5