Answer:
please look at the attached picture and I hope you understand because I made it really easy to understand
12 different combinations because 4 times 3 equals 12.
4a²b⁴ - 25x⁶y⁴
(2ab²)² - (5x³y²)²
= (2ab² + 5x³y²)(<span>2ab² - 5x³y²) By difference of two squares</span>
11, rosabell had 11 posters for the parade