Question

How do you factor 81x2−1?

Answer 1

Answer:

Step-by-step explanation:

81x²-1

Using identity a²-b² = (a+b) (a-b)

(9x)²-(1)²

(9x+1) (9x-1)

Answer 2

Answer:

Step-by-step explanation:

81x²-1

Using identity a²-b² = (a+b) (a-b)

(9x)²-(1)²

(9x+1) (9x-1)