Answer:
[tex]yr - {y}^{3 } \\ y³ + ry[/tex]
FACTORIZE
[tex]yr - {y}^{3} \\ y(r - {y}^{2} )[/tex]
[tex] {m}^{3} - mb \\ {m}^{3} - bm[/tex]
[tex] {m}^{3} - mb \\ m(r - b)[/tex]