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If the discriminant (Delta) of the quadr...

If the discriminant `(Delta)` of the quadratic equation
`4x^2+dx+25=0` is zero, then the value of d is`//`are

A

(i) `10`

B

(ii) `+-10`

C

(iii) `20`

D

(iv) `+-20`

Text Solution

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The correct Answer is:
D
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TARGET PUBLICATION-QUADRATIC EQUATIONS-Multiple Choice Questions
  1. The roots of the quadratic equation m^2-3m+1=0 are

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  2. The discriminate (Delta) of the quadratic equation 3x^2+2x-9=0 is

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  3. If the discriminant (Delta) of the quadratic equation 4x^2+dx+25=0 i...

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  4. The roots of the qudratic equation 9x^2-6x+1=0 are

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  5. The roots of the equation 2x^(2)-6x+3=0 are

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  6. Which of the following equations has no real roots?

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  7. If alpha and beta are the roots of the quadratic equation 3m^2+2m-4=...

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  8. If alpha and beta are the roots of the quadratic equation x^2-3x-2=...

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  9. If the roots of a quadratic equation are -1 and 3, then the quadratic ...

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  10. Which of the following is not a quadratic equation?

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  11. If the qudratic equation 3x+1/x=x+3 is written in standard form, the...

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  12. Which of the following equation has 3 as a root?

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  13. If one root of the quadratic equation p^2-3p+k=0 is 5, then the valu...

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  14. The roots of the quadratic equation x^2+5x+6=0 are

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  15. The roots of the quadratic equation 4sqrt(3)x^2+5x-2sqrt(3)=0 are

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  16. Which term must be added and subtracted to solve the quadratic equatio...

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  17. The roots of the quadratic equation m^2-3m+1=0 are

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  18. The discriminate (Delta) of the quadratic equation 3x^2+2x-9=0 is

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  19. If the discriminant (Delta) of the quadratic equation 4x^2+dx+25=0 i...

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  20. The roots of the qudratic equation 9x^2-6x+1=0 are

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