If the quadratic equation has equal real roots

MATHEMATICS · Single correct · A Level · Mathematics · Algebra and Functions · Algebra and Functions

Problem

If the quadratic equation 2x2+kx+18=02x^2 + kx + 18 = 0 has equal real roots, the positive value of kk is (a) 9 (b) 12 (c) 18 (d) 6

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