SOLUTION: Can you give an example of a quadratic equation for D=0?

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Question 199441: Can you give an example of a quadratic equation for D=0?
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
the domain =0
(0,y)
I will give you some rules to go by
b^2-4ac Number of solutions
number greater than 0 has two real answers
number = to 0 has 1 real answer
number less than 0 has no real answer