Question

How do you simplify `(x^2-9)/(2x+1)`?

Answer 1

= `((x+3)(x-3))/(2x+1)`

Explanation:

Only the numerator can be simplified because it is a difference of two perfect squares according to the following rule:

`A^2` - `B^2` can be factored into `(A+B) *(A-B)`

= `((x+3)(x-3))/(2x+1)`