Factor ac+5a-4c-20

$a c + 5 a - 4 c - 20$

Step 1

Factor out the greatest common factor from each group.

Group the first two terms and the last two terms.

$(a c + 5 a) - 4 c - 20$

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

$a (c + 5) - 4 (c + 5)$

Step 2

Factor the polynomial by factoring out the greatest common factor, $c + 5$ .

$(c + 5) (a - 4)$