If p(x) = x squared -1 and q(x) = 5(x-1), which expression is equivalent to (p-q)(x)

Minus the functions
(p-q)(x)=p(x)-q(x)
p(x)=
q(x)=5(x-1)

p(x)-q(x)=-5(x-1)
p(x)-q(x)=-5x+5
p(x)-q(x)=
(p-q)(x)=
or factored
(p-q)(x)=(x-4)(x-1)

The linear equation is: y=ax+b