Factorizing two variables with expressions

Question

So the question is ab - 4a + 6b - 24. I'm not really sure where to start. I thought of adding the 4 and 6 together which is equals to 10ab but then I don't really know where to go from their.

Answer 1

Grouping the terms with $a$ in them and factoring $a$ out gives

$$a(b-4) + 6b-24.$$

Factor out $6$ from $6b-24$, and continue to get a factorization.