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Multiple choice questions for which usually only two responses are given, such as: yes or no, true or false, male or female, are called Dichotomous questions. Dichotomous questions are commonly used in interviews as a way to determine if the respondents are suited to answer the next questions.
The simplified expression is 
Explanation:
The expression that we have in this problem is

We want to simplify this expression: in order to do so, we apply the rule to solve the square of a binomial:

Where in our expression, we have:

So, the various terms are:

Therefore, the final expression becomes

Learn more about simplify expressions:
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