9 Решите уравнение $$(x-7)^2 = (2-x)^2$$.

$$(x-7)^2 = (2-x)^2$$ $$x^2 - 14x + 49 = 4 - 4x + x^2$$ $$-14x + 49 = 4 - 4x$$ $$49 - 4 = 14x - 4x$$ $$45 = 10x$$ $$x = \frac{45}{10} = 4.5$$ Ответ: 4.5