Advanced MathEasyBoth numbers whose square is 49
Advanced Math practice question
The equation x² = 49 is solved by which pair of numbers?
- A. 7 and −7Correct
- B. 7 and 42
- C. 24.5 and −24.5
- D. 49 and −49
Answer: A. 7 and −7
7² = 49 and (−7)² = 49.
Why the other answers are wrong
- B. 7 and 42
- 42 is 49 − 7, not a square root.
- C. 24.5 and −24.5
- 24.5 halves 49 instead of taking its square root.
- D. 49 and −49
- 49² = 2,401.
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