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1\5 * X la puterea a 2a =5\49

Răspuns :

(1/5)• x^2 =5/49 => x^2 = (5/49) / (1/5) = (5/49) • (5/1) = 25/49 | √ => |x| = 5/7 => x= 5/7 sau x = -5/7