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प्रश्न
If the root of the given quadratic equation are real and equal, then find the value of ‘k’ X2 + 2X + k = 0.
विकल्प
1
–1
2
–2
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उत्तर
1
Explanation:
Since the roots are real and equal,
∆ = 0
∴ b2 – 4ac = 0
∴ (2)2 – 4(1)(k) = 0
∴ 4 – 4k = 0
∴ k = 1
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