Advanced MathEasyCounting real solutions of x squared plus one
Advanced Math practice question
How many real solutions does the equation x² + 1 = 0 have?
- A. ZeroCorrect
- B. One
- C. Two
- D. Infinitely many
Answer: A. Zero
x² = −1 has no real solution, since a square is never negative.
Why the other answers are wrong
- B. One
- There is no value of x that works.
- C. Two
- x² = 1 has two, but x² = −1 has none.
- D. Infinitely many
- No real x satisfies it.
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