SOLUTION: For what value(s) of t does the function f(x)=-9x^2-tx-4 have no zeros? Thank you :)

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Question 1032911: For what value(s) of t does the function f(x)=-9x^2-tx-4 have no zeros?
Thank you :)

Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
The discriminant must be negative.
%28-t%29%5E2-4%2A%28-9%29%28-4%29%3C0
t%5E2-144%3C0