<|system|>
What is $a-2b$, where $a=4-2i$ and $b=3+2i$?</s>.
<|user|>
Can you answer based on context?
<|assistant|>
Substituting in, we have $4-2i-2(3+2i)$. Expanding the last part, we have $4-2i-6-4i$; adding, we have $-2-6i$.