SOLUTION: For what value(s) of d does the function f(x)=dx^2-6x+d have no zeros? Thanks very much appreciated :)

Question 1032935: For what value(s) of d does the function f(x)=dx^2-6x+d have no zeros?
Thanks very much appreciated :)
Found 2 solutions by robertb, josgarithmetic:
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
The discriminant .
Hence , or .
==> Therefore d is any number in (, -3) ∪ (3, ).
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
Discriminant would be negative for no real zeros.

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