The quadratic equation has equal real roots

MATHEMATICS · Single correct · CBSE · Mathematics · Quadratic Equations · Quadratic Equations

Problem

The quadratic equation x2+2(k−1)x+k=0x^{2}+2(k-1)x+k=0 has equal real roots. Which one of the following equations in kk must hold true? (a) k2−6k+1=0k^{2}-6k+1=0 (b) k2−3k+1=0k^{2}-3k+1=0 (c) k2+k+1=0k^{2}+k+1=0 (d) k2−k−1=0k^{2}-k-1=0

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