Asked by kirtichawla94 | 3rd Jul, 2009, 10:57: PM

Expert Answer:

this can happen when the eqn has real and equal roots,

 i.e. when the discriminant of the equation is zero.

i.e. when


solving we get

k=0 or


Answered by  | 4th Jul, 2009, 12:23: AM

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