Choose the correct answer. The roots of x² + kx + k = 0 are real and equal, find k. (A) 0 (B) 4 (C) 0 or 4 (D) 2

Answer: (C) 0 or 4 Equal roots: b² - 4ac = k² - 4k = 0 , so k(k - 4) = 0 and k = 0 or k = 4 .

The roots of x^2 + kx + k = 0 are real and equal, find k.

Choose the correct answer.

The roots of x^2 + kx + k = 0 are real and equal, find k.

(A) 0 (B) 4 (C) 0 or 4 (D) 2

Doubtly Asked 24 Oct 2026 Save WhatsApp Report

Answer: (C) 0 or 4

Equal roots: \(b^2 - 4ac = k^2 - 4k = 0\), so \(k(k - 4) = 0\) and \(k = 0\) or \(k = 4\).

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

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