Question

The factors of 81x2 - 121y2
are​

Answer 1

Answer:

(9x+11y)(9x-11y)

Step-by-step explanation:

81x^2-121y^2=(9x)^2-(11y)^2

By using identity,

a^2-b^2=(a+b)(a-b)

(9x)^2-(11y)^2=(9x+11y)(9x-11y)