\[\boxed{\mathbf{930\ (930).\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ 4b - 8 = 4 \cdot (b - 2) < 0\]
\[2)\ \underset{\geq 0}{\overset{(b - 2)^{2}}{︸}}(b - 3) < 0\]
\[3)\ \frac{\overset{< 0}{\overbrace{b - 3}}}{\underset{> 0}{\overset{(2 - b)}{︸}}\underset{< 0}{\overset{(b - 4)}{︸}}} > 0\]