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प्रश्न
If the roots of 2x2 - 6x + k = 0 are real and equal, find k.
उत्तर
The roots of the quadratic equation are real and equal.
∴ b² - 4ac = 0
(-6)² - 4 × 2 × k = 0
- 8k = -36
`k = 9/2`
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