Question

I’m confused on how to solve this problem.

Answer 1

The last one is correct

Explanation:

`45 {d}^(3) - 18 {d}^(2)`

Let's put 9d^2 in front of the brackets:

`9 {d}^(2) (5d - 2)`

9d^2 is greater than 9d or 3d, so that makes it the greatest common factor (since the 2nd expression doesn't have a common factor)