alleryStart learning →Which of these equations has no solution among the real numbers?
Ax² − 1 = 0
Bx² + 1 = 0
Cx² − 4 = 0
Dx² + x = 0
Answer & Solution
Correct answer: B. x² + 1 = 0
Since x² is never negative for real x, x² = −1 cannot hold, so only x² + 1 = 0 lacks a real root.
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