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√6+√2
3√2 × √6 - √2 = 3√2(√6 - √2) = 3√12 - 3√4 = 3√12 - 3√4
√6 + √2 √6 - √2 (√6 +√2)(√6 - √2) 6-2 4
2. 2√3-3√2 = 2√3-3√2 × 5√5 +2√2 = (2√3-3√2)(5√5+2√2)
5√5+2√2 5√5-2√2 5√5 +2√2 (5√5-2√2)(5√5+2√2)
= 10√15 + 4√6 - 15√10 - 6√4 = 10√15 + 4√6 - 15√10 - 6√4
125-8 117
3. √12 - 6√3 = 2√3 - 6√3 = -4√3