The Official SAT Question of the Day™

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

If (x + y)² = x² + y², which of the following statements must also be true?

1. x = 0
2. (x - y)² = x² + y²
3. xy = 0

1.    None



2.   I only



3.   II only



4.   III only



5.   II and III

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