1. Multiply the 5 and 2 because it is the first term in the parenthesis.
2. Now, we'll multiply 6d and 5 because it is both on the other sides.
3. We are also going to multiply 3d and 2 because it is both on the inside portion.
4. Lastly, we're going to multiply 3d and 6d because it is both the last term.
=10+30d+6d+18d to the second power
=10+36d+18d to the second power