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4. Reduceți termenii asemenea: a) 2√3+3√2-2√√3+5√√2; c) 5√3+3√2-4√3-3√2-√3; e) 18√5-3√7+10√7-9√5+1; b) -6√5-3√2-5√5 +2√2+11√5 +3√2; d) 2-3√7+5√2+8√√7-√2-2; 1) 2√10-√11-√10-√11+3√11​

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