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Simp.baku=√(7-7)²+√(6-7)²+√(8-7)²+√(8-7)²+√(9-7)²+√(5-7)²+√(9-7)²+√(6-7)²+√(5-7)²/9=√0²+√1²+√1²+√1²+√2²+√2²+√2²+√1²+√2²/9=√20/9= √4.5/9=2√5/9