√(9-4√2)= √(2√2-1)^2 = 2√2-1
√(3+2√2)=√(√2+1)^2 = √2+1
2√2-1-√2-1 = √2-2
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√(9-4√2)= √(2√2-1)^2 = 2√2-1
√(3+2√2)=√(√2+1)^2 = √2+1
2√2-1-√2-1 = √2-2