Вычислите: (2,45^2+4,9*3,55+3,55^2)/(4,23^2-4,23*2,46+1,23^2).

\[\frac{{2,45}^{2} + 4,9 \bullet 3,55 + {3,55}^{2}}{{4,23}^{2} - 4,23 \bullet 2,46 + {1,23}^{2}} =\]

\[= \frac{(2,45 + 3,55)^{2}}{(4,23 - 1,23)^{2}} = \frac{6^{2}}{3^{2}} = \frac{36}{9} = 4\]