Answer:
849x²+109x+24615
Step-by-step explanation:
Total electricity produced:
→ -17x² +181x + 14453+866x²-72x+10162
group the term like this ↓
→ - 17x²+866x²+181x-72x+14453+10162
same thing here ↓
→ 17x²+866x²+181x-72x+24615
add and subtract terms ↓
→ 849x²+181x-72x+24615
final result will appear like this ↓
→ 849x²+109x+24615