Question

3. a2 - 81 (b - c)2 factorise​

Answer 1

Answer:

a/ b × c / 81

Step-by-step explanation:

After that u will get answer.

Answer 2

Answer:

Question :-

➠ a² - 81(b - c)²

Formula used :-

➪ a² - b²

➭ (a + b) (a - b)

Answer :-

➠ a² - 81(b - c)²

➻ (a)² - {9(b - c)}²

➻ (a)² - (9b - 9c)²

➻ {(a) + (9b - 9c)} {(a) - (9b - 9c)}

➻ (a + 9b - 9c) (a - 9b + 9c)

∴ The value of a² - 81(b - c)² is (a + 9b - 9c) (a - 9b + 9c)