FACTORISE 9xsq -y sq divded by 25

Sure, let's factorise the given expression step by step.

The given expression is (9x^2 - y^2) / 25.

First, we can rewrite the numerator as a difference of squares. The difference of squares is a term used in algebra to describe the product of the sum and difference of two terms. The formula is a^2 - b^2 = (a+b)(a-b).

So, 9x^2 - y^2 can be written as (3x + y)(3x - y).

Now, the expression becomes (3x + y)(3x - y) / 25.

This is the factorised form of the given expression.