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CBSE Class 10 Answered

If -5 is a root of the quadratic equation 2x*x + px -15 =0 and the quadratic equation p(x*xx+x)+k=0 has equal roots, find the value of k.
Asked by Samiksha Srivastava | 16 Jan, 2014, 06:48: PM
Expert Answer
Given that -5 is a root of the quadratic equation
Therefore, we have,
 
Substituting the value of p in the other given equation we have,
 
 
Since the roots of the equation, are equal, the discriminant,
Answered by Vimala Ramamurthy | 17 Jan, 2014, 08:59: AM
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