Answer:
When you factor this polynomial expression
you get that is equal to

Explanation:
- Factor
:
1.1 Apply exponent rule
in this term
so

1.2 Rewrite as

1.3 Factor out common term 5m,

2. Factor
:
2.1 Rewrite as

2.2 Factor out common term -3n,

3. Factor out common term
which is equal to
