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The discriminant of the equation x^(2) -...

The discriminant of the equation `x^(2) - 7x + 2 = 0` is

A

47

B

40

C

41

D

-41

Text Solution

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The correct Answer is:
C
Use the formula to find the discriminant.
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PEARSON IIT JEE FOUNDATION-QUADRATIC EXPRESSIONS AND EQUATIONS-Level 1
  1. The solution of the equation x^(2) + x +1 = 1 is are

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  2. The discriminant of the equation x^(2) - 7x + 2 = 0 is

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  3. Find the maximum value of the quadratic expression - 3x^(2) + 7x + 4

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  4. If alpha and beta are the of the equation x^(2) + 3x - 2 = 0 then al...

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  5. If one of the roots of the an equation, x^(2) - 2x + c =0 is thrice th...

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  6. The number of real roots of the quadratic equation 3x^(2) + 4 = 0 is

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  7. if alpha and beta are the roots of the equatio0n x^2+px+q=0and does no...

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  8. Which of the following equations does not have real roots ?

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  9. The sum of the roots of the equation, ax^(2) + bx + c = 0 where a,b an...

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  10. For the quadratic equation x^(2) + 3x - 4 = 0 which of the following i...

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  11. Find the quadratic equation whose roots are reciprocals of the roots ...

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  12. The number of real roots of the quadratic equation (x-4)^(2)+ (x-5)^(2...

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  13. The number of distinct real solution of |x|^(2) - 5|x| + 6 = 0 is

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  14. The number of real roots of the equation |x^2|– 5|x|+6 = 0 is

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  15. In writing a quadratic equation of the form x^(2) + px + q = 0,a stud...

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  16. The roots of the equation 6x^(2) - 8sqrt(2x) + 4 = 0 are

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  17. Which of the following equations has roots as a,b and c ?

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  18. If the roots of the equation 2ax^(3) + (3b-9) x + 1 = 0 are -2 and 3,...

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  19. The roots of the equation x^(2) + 5x + 1 = 0 are

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  20. If alpha amd beta are the roots of the equation 3x^(2) - 2x - 8 = 0 t...

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