Respuesta :

The expression, 81a^6 - 100, is a difference of 2 squares. The term 81a^6 is a square of 9a³. The  term, 100, is a square of 10. The factors of the  expression comes out to (9a³ - 10) x (9a³ + 10).

Answer: the answer is c

Step-by-step explanation: