The answer is
486 - 250 y
Answer:
Step-by-step explanation:
81 x6−25y10 = 9²*(x³)² - 5²*(y⁵)²
= (9x³)² - (5y⁵)²
= (9x³ - 5y⁵) (9x³ + 5y⁵) { (a² - b²) = (a+b)(a-b) }
