|
SAT试题类型 MathematicsStandard 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 | 
