(x^2 - 9)/(x^2 + 3x) has to be simplified.
Use the relation a^2 - b^2 = (a - b)(a + b)
`(x^2-9)/(x^2 + 3x)`
=> `((x - 3)(x+3))/(x*(x+3))`
=> `(x - 3)/(x)`
The required simplified form is `(x - 3)/x`
these are all correct so I am going to keep it simple the answer is
the answer is (x-3)/x