Factor the expression.

20g^3+24g^2-15g-18

To factor the expression 20g^3 + 24g^2 - 15g - 18, we can group the terms:

(20g^3 + 24g^2) - (15g + 18)

Then, we can factor out the greatest common factor from each group:

4g^2(5g + 6) - 3(5g + 6)

Now, notice that there is a common binomial factor of (5g + 6). Factoring this out gives us:

(4g^2 - 3)(5g + 6)

Therefore, the expression 20g^3 + 24g^2 - 15g - 18 can be factored as (4g^2 - 3)(5g + 6).