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Find the value(s) of k, if the quadratic equation 3x
^{
2
}
− k√3 x + 4 = 0 has equal roots.

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Last updated at May 29, 2018 by Teachoo

Download Sample Paper of Class 10 here https://www.teachoo.com/cbse/sample-papers/

Transcript

Question 2 Find the value(s) of k, if the quadratic equation 3x2 k 3 x + 4 = 0 has equal roots. 3x2 k 3 x + 4 = 0 Comparing equation with ax2 + bx + c = 0 a = 3, b = k 3 , c = 4 Since the equation has 2 equal roots, D = 0 b2 4ac = 0 Putting values (" k" 3)^2 4 3 4=0 3k2 48 = 0 3k2 = 48 k2 = 48/3 k2 = 16 k = 16 k = (4 4) k = 4 k = 4

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Class 10

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Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.