Question

How do you simplify the expression `25sin^2x-9`?

Answer 1

`25sin^2x-9=(5sinx+3)(5sinx-3)`

Explanation:

The simplest way is to use the difference of squares relation.

`color(blue)(a^2-b^2=(a+b)(a-b))`

`25sin^2x-9=(5sinx+3)(5sinx-3)`