RS Aggarwal - Mathematics

Book: RS Aggarwal - Mathematics

Chapter: 10. Quadratic Equations

Subject: Maths - Class 10th

Q. No. 1 of Exercise 10C

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1

Find the discriminant of each of the following equations:

(x – 1)(2x – 1) = 0

Given: (x – 1)(2x – 1) = 0

2x2 – 3x + 1 = 0


Comparing with standard quadratic equation ax2 + bx + c = 0


a = , b = , c = – 1


Discriminant D = b2 – 4ac


= (– 3)2 – 4.2.1


= 9 – 8 = 1


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