OR
Find the value of k for which the equation 2kx²- 40x + 25 = 0 has equal
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1. Answer:

   2kx^2 – 40x + 25 = 0

   Here, a=2k, b=-40, c=25

   D = b^2 – 4ac

   = (-40)^2 – 4(2k)(25)

   = 1600 – 200k

   given, D = 0

   so, 1600 – 200k = 0

   – 200k = -1600

   200k = 1600

   2k = 16

   k = 16/2

   k = 8.

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