If P(x)=(x−3)Q(x)+rP(x) = (x-3)Q(x) + rP(x)=(x−3)Q(x)+r, which of the following is true?
P(3)=rP(3) = rP(3)=r
P(r)=3P(r) = 3P(r)=3
P(0)=3rP(0) = 3rP(0)=3r
P(3)=0P(3) = 0P(3)=0 if r≠0r \neq 0r=0