Find the product.
(r + s)2
a) r² + 2rs + s
b) r² + 2rs + s²
c) r² + 2rs + 2s²

To answer the query above, square the binomial. First step in doing so is to square the first term. Then, multiply 2 to the product of the terms. Lastly, square the second term. 
  
                                          (r + s)^2 = r^2 + 2rs + s^2

Thus, the answer is letter B.