Factor 5p*(r-s)-(r-s)

$5 p \cdot (r - s) - (r - s)$

Factor $r - s$ out of $5 p \cdot (r - s)$ .

$(r - s) \cdot (5 p) - (r - s)$

Factor $r - s$ out of $- (r - s)$ .

$(r - s) \cdot (5 p) + (r - s) \cdot - 1$

Factor $r - s$ out of $(r - s) \cdot (5 p) + (r - s) \cdot - 1$ .

$(r - s) (5 p - 1)$