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= {1 / (√3+√2)} x (√3-√2) / (√3-√2)
= (√3-√2) / 3 - 2 = (√3-√2) / 1 = √3-√2
2. (1-√2)/(1+√2) = {(1-√2)/(1+√2)} x (1-√2)/(1-√2)
= (1-2√2+2) / (1-2)
= (3-2√2) / -1 = 2√2 -3