\[(x + 4)^{2} - (x - 2)(x + 2) =\]
\[= x^{2} + 8x + 16 - x^{2} + 2 =\]
\[= 8x + 18;\]
\[x = - 0,125 = - \frac{1}{8}:\]
\[8 \cdot \left( - \frac{1}{8} \right) + 18 = - 1 + 18 = 17.\]