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2 Efectuați, utilizând formula (a - b)² = a² - 2ab + b²: a (x - 2)²; b (a - 1)²; c (4- b)²; e (2a - b)²; f (x - 4y)²; g (5a - 6m)²; i (2-3√2); i (2√3-3√6)'; k (5√2x-3√3y): 7 1y); 3 m 2 5 x-2; n 2a X 3 4 2 ; 2 -X 7 d (5-2c)²; h (2z-10f)²; 1(3-√/14x-2√21y): 16 5 P-X 4 Ey 25 2 OFER 100 DE PUNCTE DACA E FACUTA REPEDE ​