Find the value of c so that (x-5) is a factor of the polynomial p(x)

I think the question is

Find the value of c so that (x-5) is a factor of the polynomial

The other factor is going to be some quadratic.  We can say a few things about its coefficients but let's start by saying in general it's

Equating respective coefficients,

so we get

-37

Check:

f(2x−x2)=−3x2+6x−1

step-by-step explanation:

set up the composite function and evaluate.

f(2x−x2)=−3x2+6x−1

no this is a nonlinear negative