Respuesta :

Answer:

( 7a - 2b ) ( 3x - 5y )

Step-by-step explanation:

21ax + 10by - 35ay - 6bx

21ax - 35ay - 6bx + 10by

7a ( 3x - 5y ) - 2b ( 3x - 5y )

( 7a - 2b ) ( 3x - 5y )