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O-utside

I-nside

L-ast

Ex: (5+3d)(2+6d)

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.

(5+3d)(2+6d)

=10+30d+6d+18d to the second power

=10+36d+18d to the second power