Respuesta :

Answer:10a

Step-by-step explanation:

Since both terms are perfect squares, factor using the difference of squares formula,

a

2

−

b

2

=

(

a

+

b

)

(

a

−

b

)

where

a

=

9

and

b

=

10

a

.

(

9

+

10

a

)

(

9

−

10

a

)