Answer:
mn(5mn² + 9) ;
2mn(1 - 1/2mn²)
Step-by-step explanation:
Given:
5m²n³ +9mn
(8mn - 4m²n³ ÷ 4)
5m²n³ + 9mn
mn(5mn² + 9)
8mn/ 4 - 4m²n³ / 4
2mn - m²n³
