Determine the range of for which the quadratic equation has no real roots.

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

Problem

Determine the range of pp for which the quadratic equation 3x2+(2p−1)x+(p+4)=03x^{2} + (2p - 1)x + (p + 4) = 0 has no real roots. (a) p<4−632  or  p>4+632p < \dfrac{4 - \sqrt{63}}{2}\;\text{or}\;p > \dfrac{4 + \sqrt{63}}{2} (b) 4−632≤p≤4+632\dfrac{4 - \sqrt{63}}{2} \le p \le \dfrac{4 + \sqrt{63}}{2} (c) 4−632<p<4+632\dfrac{4 - \sqrt{63}}{2} < p < \dfrac{4 + \sqrt{63}}{2} (d) 5−694<p<5+694\dfrac{5 - \sqrt{69}}{4} < p < \dfrac{5 + \sqrt{69}}{4}

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