Q. 11 D5.0( 1 Vote )

Find the values of k, for which the given equation has real roots:

kx2 – 2√5x + 4 = 0

Answer :

Roots are equal


d = 0


d = b2 – 4ac


d = (–2√5)2 – 4 (k) (4)


d = 20 – 16k


Put d = 0


0 = 20 – 16k


16k = 20




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