Ответы и объяснения

2013-12-20T12:42:12+00:00
(x+10)^2 = (2-x)^2
x^2 + 20x + 100 = 4 - 4x + x^2
x^2 + 20x + 100 - 4 + 4x - x^2 = 0
24x + 96 = 0
24x = -96
x = -1.5