Решите уравнение (x + 5)^2 + (x - 10)^2 = 2x^2

(x + 5)^2 + (x - 10)^2 = 2x^2(x + 5)(x + 5) + (x^2 - 2*x*10 + 10^2) = 2x^2x^2 + 5x + 5x + 25 + x^2 - 20x + 100 = 2x^22x^2 - 10x + 125 = 2x^22x^2 - 10x + 125 - 2x^2 = 0-10x + 125 = 0-10x = -125Перемножаем на (-1)10x = 125x = 125:10х = 12,5Ответ: 12,5