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2014-01-05T10:49:52+02:00
S=a+b
S=√(√3-√7)²+√(√3+√7)²
S=√(3-2√21+7)+√(3+2√21+7)
S=√3-√44+√7+√3+√44+√7
S=2√3+2√7
S=2(√3+√7)
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