Posted by jackie on Saturday, February 26, 2011 at 11:19am.
For the roots of the quadratic equation
ax^2+bx+c=0
to be equal, the discriminant Δ must equal to zero, where
Δ=b^2-4ac...(1)
For the given equation
3x^2-6x+k=0
a=3,b=-6, c=k
Substitute a,b,and c in (1), equate to zero and solve for k.
Post your answer for checking if you wish.
k=6
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