答案:C
解析:
Squaring both sides of the equation square root (x-a) = square root (x + b) gives the equation x-a = x + b. Subtracting x from both sides now gives -a = b, or a + b = 0.
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答案:C
解析:
Squaring both sides of the equation square root (x-a) = square root (x + b) gives the equation x-a = x + b. Subtracting x from both sides now gives -a = b, or a + b = 0.