PIMSO 2022 - Mathematics - Grade 8 / Secondary 2 - National Round Question 16

Let $R$ and $F$ $(R,F\ne0)$ be the roots of the equation $x^2-3x+2=0$. If $RF$ and $R-F$ are the roots of the equation $(p+1)x^2-mx+s=0$, find $p+m-s$.