SAT考试官方网站每日一题之数学篇(五)

Read the following SAT test question, then click on a button to select your answer.
        If (t – 2)2 = 0, what is the value of (t + 3)(t + 6)? 
        A.40
        B.18
        C.9
        D.4
        E.It cannot be determined from the information given.
        Correct Answer: A
        Here's Why: 
        Since (t – 2)2 = (t – 2)(t – 2) = 0, it follows that t – 2 = 0, and so t = 2. Therefore, (t + 3)(t + 6) = (2 + 3)(2 + 6) = (5)(8) = 40.
        Difficulty: Medium 
        Question Type: Standard Multiple Choice

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