Question

4x^2-9^2=

 

Answer 1

\(4x^2-9^2=2^2x^2-9^2=\left(2x-9\right)\left(2x+9\right)\)

Answer 2

\(\left(2x-9\right)\left(2x+9\right)\)

Answer 3

\(4x^2-81=\left(2x-9\right)\left(2x+9\right)\)