Question

121a²–1=......................​

Answer 1

Answer:

a = +1/11 and - 1/11

Step-by-step explanation:

using identity (a²-b²) = (a+b)(a-b)

121a²–1

= (11a)² - 1²

= (11a-1)(11a+1)

Therefore, a = +1/11 and - 1/11