Answer: A. [tex]9x^2 - 16y^2[/tex] .
Step-by-step explanation:
- A difference of squares problem is factored as :[tex]a^2 - b^2 = (a + b)(a - b)[/tex]
- For this both terms in the form of squares and a minus sign between them.
From all the options only option A has both terms square and they minus sign between them.
Also, [tex]9x^2 - 16y^2= (3x)^2-(4y)^2=(3x+4y)(3x-4y)[/tex]
Here a= 3x and b= 4
Hence, the correct answer is A. [tex]9x^2 - 16y^2[/tex] .
