Expand the following in ascending powers of \(x\) up to and including the term in \(x ^ { 2 }\).
\(( 1 + 2 x ) ^ { 5 }\).
\(( 1 - a x ) ^ { 6 }\), where \(a\) is a constant.
In the expansion of \(( 1 + 2 x ) ^ { 5 } ( 1 - a x ) ^ { 6 }\), the coefficient of \(x ^ { 2 }\) is - 5 .