Answer: The expression (q + 1)^2 is equal to q^2 + 2q + 1.
The expression (q + 1)^2 can be expanded as follows: (q + 1)^2 = q^2 + 2q + 1. The "2" at the top of the parentheses is the exponent, meaning the expression inside the parentheses is being raised to the power of 2.
Explanation: