Задача Задача №641060
А
А
(2x-7)(x+1)+3(4x-1)(4x+1)=2(5x-2)²-53 (2x^2 - 7x + 2x - 7) + (12x^2 - 4x + 12x - 3) = 2(25x^2 - 20x + 4) - 53 (2x^2 - 5x - 7) + (12x^2 + 8x - 3) = 50x^2 - 40x + 8 - 53 14x^2 + 3x - 10 = 50x^2 - 40x - 45 36x^2 + 43x + 35 = 0
Ответ: 36x^2 + 43x + 35 = 0
