Write the phrase as an expression: The product of c and 4

Polynomial that can be factored as (3x-4)(3x+4)

Witch represents the inverse of the function f(x)=1/4x-12

Can you me with this question? i'll reward *30 points i just need with this one question so that i could solve the others. * edit: i originally set up the question to reward 30 points, but for some reason i can only reward 15. if you don't get 30, then i'm sorry. i'm still kind of new to this site