Question

factor:

49^2 - 81

Answer 1

difference of squares

Answer 2

There is something wrong. Is it 49^2? Or 49x^2?

Answer 3

oops 49x^2 sorry bout that

Answer 4

Ok. So, you have difference of squares.
(a^2 - b^2) = (a-b)(a+b)

Here, a=7x; b = 9;

So, you get:
(7x-9)(7x+9)

Answer 5

Thank you!