Ответы на вопрос:
1) (4x - 1) (2x - 3) = 0 8x² - 12x - 2x + 3 = 0 8x² - 14 x + 3 = 0 d = 196 - 4*8*3 = 196 - 96 = 100 x1 = (14+10)/16 = 24/16 = 1,5 x2 = (14-10)/16 = 4/16 = 0,25. 2) 2c(a - 3d + 4) = 2ca - 6cd + 8c. 3) (a+2)(a²-a-3) = 0a³ - a² - 3a + 2a² - 2a - 6 = 0a³ + a² - 6a - 6 = 0 (a + 1)(a² - 6) = 0a + 1 = 0 или a² - 6 = 0a = -1 a² = 6 a = +- √64) (4ab²-6b²b): 2ab = (2b²(2a - 3b))/2ab = (b(2a-3b))/a = (2ab - 3b²)/a
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