Answer:
[tex]\large\boxed{B)\ 16x^2-25}[/tex]
Step-by-step explanation:
[tex]\text{Use}\ (a-b)(a+b)=a^2-b^2[/tex]
[tex](4x-5)(4x+5)=(4x)^2-5^2=16x^2-25[/tex]
