Подстановка условия
[src](2*x - 1)^2 + (2*x + 1)^2 при x = 1/2
(2*x - 1)^2 + (2*x + 1)^2
$$\left(2 x - 1\right)^{2} + \left(2 x + 1\right)^{2}$$
(2*(1/2) - 1)^2 + (2*(1/2) + 1)^2
$$\left(2 (1/2) - 1\right)^{2} + \left(2 (1/2) + 1\right)^{2}$$
(2/2 - 1)^2 + (2/2 + 1)^2
$$\left(-1 + \frac{2}{2}\right)^{2} + \left(\frac{2}{2} + 1\right)^{2}$$