Найдите корень уравнения (x-8)^2=(x+20)^2
(x - 8 - (x + 20)) (x - 8 + x + 20) = 0 (x - 8 - x - 20)(2x + 12) = 0 - 28 (2x + 12) = 0 / :(-28) 2x + 12 = 0 /:2 x + 6 = 0 x = - 6