if the roots of the quadratic equation 2x square + 8x +k =0 are equal , then  find the value of k .

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  • -1
2x^2 + 8x + k=0 roots r equal it implies Discriminant of the given equation is equal to 0 therefore b^2-4ac = 0 : 64- 4?2?k = 0 => 64-8k = 0 => 8(8-k) = 0 => 8-k = 0 that is k = -8
  • 2
it will be 8
  • 0
wait
  • -1
thanks vishak 
  • -2
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