To find the product, we need to do FOIL (first, outer, inner, last). That's saying what we should multiply. This product is equal to:
(2b)(5b) + (2b)(8) + (2)(5b) + (2)(8)
Now we can simplify and solve.
10b² + 16b + 10b + 16
Combine like terms.
10b² + 26b + 16