Решите уравнение: а)25x^2 - 49; б)(3x - 8)^2.
25x^2 - 49 = 0 25x^2 = 49 x^2 = 49/25 x = ± √(49/25) x = ± 7/5 x = ± 1,4 (3x - 8)^2 = 0 3x - 8 = 0 3x = 8 x = 8/3