Chapter 4: Quadratic Equations

Example 6. Find the value of such that the quadratic equation has equal roots.

Solution:-

Here

D = b2 - 4ac

For equal roots,

i.e.

Or,

But for the quadratic equation does not exists.

 

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Subjects Maths (Part-1) by Mr. M. P. Keshari
Chapter 1 Linear Equations in Two Variables
Chapter 2 HCF and LCM
Chapter 3 Rational Expression
Chapter 4 Quadratic Equations
Chapter 5 Arithmetic Progressions
Chapter 6 Instalments
Chapter 7 Income Tax
Chapter 8 Similar Triangles