Basic Math Examples

$12 m^{2} n - 9 m n^{2}$

Step 1

Factor $3 m n$ out of $12 m^{2} n$ .

$3 m n (4 m) - 9 m n^{2}$

Step 2

Factor $3 m n$ out of $- 9 m n^{2}$ .

$3 m n (4 m) + 3 m n (- 3 n)$

Step 3

Factor $3 m n$ out of $3 m n (4 m) + 3 m n (- 3 n)$ .

$3 m n (4 m - 3 n)$