English

The value of the discriminant of the equation 2x^2 – 3x + 5 = 0, is ______.

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Question

The value of the discriminant of the equation 2x2 – 3x + 5 = 0, is ______.

Options

  • 31

  • `sqrt(-31)`

  • `sqrt(31)`

  • –31

MCQ
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Solution

The value of the discriminant of the equation 2x2 – 3x + 5 = 0, is –31.

Explanation:

For 2x2 – 3x + 5 = 0, 

a = 2, b = –3, c = 5. 

The discriminant D = b2 – 4ac 

= (–3)2 – 4 × 2 × 5 

= 9 – 40

= –31

Since D < 0, the equation has nonreal (complex) roots.

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Chapter 5: Quadratic Equation - EXERCISE 5C [Page 63]

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R.S. Aggarwal Mathematics [English] Class 10 ICSE
Chapter 5 Quadratic Equation
EXERCISE 5C | Q 31. | Page 63
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