Ответ Автор - uran75 1) 5x² - 9x -2 = 0x1 = 2 ; x2 = - 2) 2x² - 11x + 5 =0x1 = 5 ; x2 = - 3) 5x² + 11x + 2 = 0x1 = - ; x2 = -2