Out of the following equations which one is not a quadratic equation ?

Choose the correct answer.

(A) \(x^2 + 4x = 11 + x^2\) (B) \(x^2 = 4x\) (C) \(5x^2 = 90\) (D) \(2x - x^2 = x^2 + 5\)

Doubtly Asked 24 Oct 2026 Save WhatsApp Report

1 answer

Answer: (A) \(x^2 + 4x = 11 + x^2\)

In (A) the \(x^2\) terms cancel: \(4x = 11\), which is linear. The others keep an \(x^2\) term.

Doubtly AI · 24 Oct 2026 AI-verified · Oct 2026 Report

Was this answer helpful?