Basic Math Examples

$21 m^{3} - 28 m n^{2}$

Step 1

Factor $7 m$ out of $21 m^{3}$ .

$7 m (3 m^{2}) - 28 m n^{2}$

Step 2

Factor $7 m$ out of $- 28 m n^{2}$ .

$7 m (3 m^{2}) + 7 m (- 4 n^{2})$

Step 3

Factor $7 m$ out of $7 m (3 m^{2}) + 7 m (- 4 n^{2})$ .

$7 m (3 m^{2} - 4 n^{2})$