Question

Divide.

Answer 1

I will assume 9x20 is a typo, and will assume that it's 9x + 20.

\(x^2+9x+20 = (x+4)(x+5)\), and \(x^2-25 = (x+5)(x-5)\).
The new expression is
\[\frac{ (x+4)(x+5) }{ (x+5)(x-5) }\times\ \frac{ x-4 }{ x+4 }\]

Your answer is correct.

Answer 2

lol yes 9x+20 and thanks