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  SAT试题类型 Mathematics Standard Multiple Choice

  Read the following SAT test question and then click on a button to select your answer.

  If square root = square root , which of the following must be true?

  Answer Choices

  a = 0

  b = 0

  a + b = 0

  a minus b = 0

  + = 0

  答案:B

  解析:

  Explanation

  Squaring both sides of the equation square root = square root gives the equation x minus a = x + b. Subtracting x from both sides now gives negative a = b, or a + b = 0

  

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