If you were given the dividend which is a polynomial, the quotient, and remainder what would you have to do to find the divisor?
Let
$\displaystyle p(x)$ be the dividend
$\displaystyle q(x)$ be the quotient
$\displaystyle r(x)$ be the remainder
$\displaystyle m(x)$ be the divisor
$\displaystyle \displaystyle \frac{p(x)}{m(x)}=q(x)+r(x) \iff \frac{m(x)}{p(x)}=\frac{1}{q(x)+r(x)} \iff m(x)=\frac{p(x)}{q(x)+r(x)}$