Respuesta :

Simple...

you have: [tex]5 x^{2} -45[/tex]

Using the box method-->>

5(x+3)(x-3)

Thus, your answer.
altavistard
Hint:  Divide both terms by 5 (that is, factor the 5 out of the given expression).

You will then have 5(x^2-9).  Factor (x^2-9) now.