Step-by-step explanation:
1. a² - ( b ² - 2bc + c² ) = a ² - b ² + 2bc - c²
2. 8p² - 18 q²
3. 3ab² - c²d + 3ab - b²c²
4. x² - 2x + 1
Sorry but there are no photos or anything, please post a photo or something so I can answer your question!
Answer:
The answer is 699...............
Step-by-step explanation:
rjrurjrrmrjrjrnrbrbdu