Factor 3a+ab+3c+bc

$3 a + a b + 3 c + b c$

Step 1

Factor out the greatest common factor from each group.

Group the first two terms and the last two terms.

$(3 a + a b) + 3 c + b c$

Factor out the greatest common factor (GCF) from each group.

$a \cdot (3 + b) + c \cdot (3 + b)$

Step 2

Factor the polynomial by factoring out the greatest common factor, $3 + b$ .

$(3 + b) (a + c)$