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Mathematics>Standard Multiple Choice
Read the following SAT test question and then click on a button to select your answer.
If square root (x-a) = square root (x + b), which of the following must be true?
(A) a = 0
(B) b = 0
(C) a + b = 0
(D) a-b = 0
(E) (a^2) + (b^2) = 0
