Respuesta :

Answer:

hope this answer will help u.

Step-by-step explanation:

( 5x + 3y )² - ( 5x - 3y )² - 60xy

= ( 25x² + 30xy + 9y²) - ( 25x² - 30xy + 9y² ) - 60xy

= 25x² + 30xy +9y² - 25x² + 30xy - 9y² - 60xy

= 60xy - 60xy

= 0