Advanced MathEasyConstant giving two real solutions
Advanced Math practice question
The equation x² = k has exactly two real solutions. Which of the following could be the value of k?
- A. 9Correct
- B. 0
- C. −9
- D. −1
Answer: A. 9
x² = 9 has the solutions 3 and −3.
Why the other answers are wrong
- B. 0
- x² = 0 has only the solution 0.
- C. −9
- A square cannot be negative.
- D. −1
- A square cannot be negative.
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