Factor 15ab+30a-45

$15 a b + 30 a - 45$

Factor $15$ out of $15 a b$ .

$15 (a b) + 30 a - 45$

Factor $15$ out of $30 a$ .

$15 (a b) + 15 (2 a) - 45$

Factor $15$ out of $- 45$ .

$15 (a b) + 15 (2 a) + 15 \cdot - 3$

Factor $15$ out of $15 (a b) + 15 (2 a)$ .

$15 (a b + 2 a) + 15 \cdot - 3$

Factor $15$ out of $15 (a b + 2 a) + 15 \cdot - 3$ .

$15 (a b + 2 a - 3)$