For what value of k the roots of the equation 3x² - 6x + k = 0 or equal?
- 4
- 3
- 2
- None of these
Explanation
For the quadratic equation 3x^2 - 6x + k = 0 to have equal roots, the discriminant b^2 - 4ac must be 0.
Here, a = 3, b = -6, and c = k.
Setting the discriminant to 0 gives (-6)^2 - 4(3)(k) = 0.
Solving this, 36 - 12k = 0, which yields k = 3.
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- 25
- 30
- 35
- None of these
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- 10x = - 3
- 2x = - 27
- 2x = 27
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
- 1, 4, -21
- 1, 4, 21
- -1, 4, -21
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
- 2/x + 12/(x +5)
- 3/x + 22/(x +5)
- 4/x + 16/(x +5)
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
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