Question

Which of the following equations does not have a real root?

• A. \(x^2 = 0\)
• B. \(2x - 1 = 3\)
• C. \(x^2 + 1 = 0\)
• D. \(x^3 + x^2 = 0\)

Hint:

Equations involving negative square roots have complex roots, not real.

Answer 1

The Correct Option is C

\(x^2 + 1 = 0 \Rightarrow x^2 = -1\) There is no real number whose square is negative. So, no real root.