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प्रश्न
If the roots of the quadratic equation `2x^2+8x+k=0` are equal then find the value of k.
उत्तर
It is given that the roots of the quadratic equation `2x^2+8x+k=0`
are equal.
∴`D=0`
⇒`8^2-4xx2xxk=0`
⇒`64-8k=0`
⇒`k=8`
Hence, the value of k is `8`.
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