8.
$$\mathrm { f } ( x ) \equiv 2 x ^ { 3 } - 5 x ^ { 2 } + p x - 5 , p \in \mathbb { R }$$
Given that \(1 - 2 \mathrm { i }\) is a complex solution of \(\mathrm { f } ( x ) = 0\),
- write down the other complex solution of \(\mathrm { f } ( x ) = 0\),
- solve the equation \(\mathrm { f } ( x ) = 0\),
- find the value of \(p\).