Basic Math Examples

$- 21 m^{2} n - 9 m n^{4}$

Step 1

Reorder $- 21 m^{2} n$ and $- 9 m n^{4}$ .

$- 9 m n^{4} - 21 m^{2} n$

Step 2

Factor $- 3 m n$ out of $- 9 m n^{4}$ .

$- 3 m n (3 n^{3}) - 21 m^{2} n$

Step 3

Factor $- 3 m n$ out of $- 21 m^{2} n$ .

$- 3 m n (3 n^{3}) - 3 m n (7 m)$

Step 4

Factor $- 3 m n$ out of $- 3 m n (3 n^{3}) - 3 m n (7 m)$ .

$- 3 m n (3 n^{3} + 7 m)$