Question

If quarditic equation x^2-4x+k=0 have equal roots then find the value of k

Answer 1

answer:

if the quadratic equation has equal roots then

b^2-4ac=0

according to the question

a=1, b=-4, c=k

so ,-4^2-(4* 1* k) =0

=16+-4k =0

= -4k=-16

= k=-16/-4

=4

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