Q. 124.7( 7 Votes )

For what value of

Answer :

 


For a quadratic equation, ax2 + bx + c = 0,


D = b2 – 4ac


If D = 0, roots are real and equal



kx2 – 2√5kx + 10 = 0


D = 4 × 5k2 – 4 × k × 10 = 0


k2 = 2k


k = 2

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