\[\boxed{\text{1195\ (1195).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[1)\ (a - b)(a + b) - c(c - 2b) =\]
\[= a^{2} - b^{2} - c^{2} + 2bc =\]
\[= a^{2} - (b - c)^{2} =\]
\[= (a - b + c)(a + b - c)\]
\[2)\ (b - c)(b + c) - a(a + 2c) =\]
\[= b^{2} - c^{2} - a^{2} - 2ac =\]
\[= b^{2} - (a + c)^{2} =\]
\[= (b - a - c)(b + a + c)\ \]