Respuesta :

Answer:  5 (2x+1 ) ( 2x - 1)


Step-by-step explanation:

Factor commum term 5 :

Rewrite 20 as 5*4

5 * 4x² - 5

Factor common term 5 :

= 5 ( 4x²-1 )

Factor  4x²-1 :

(2x+ 1) (2x-1 )

Therefore:

= 5 (2x+1 ) ( 2x - 1)


Hope that helps!