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Method and examples
Method

Directrix of a function

 y =

1. y=x^2+3x-4
2. y=(x+2)^2-9
3. y=3x^2+6x-1
4. y=3(x+1)^2-4
5. y=1/(x+4)-5
I don't the exact solution of some problems, so this calculator is incomplete.
So for wrong solution, please submit the feedback form with correct solution.
Range is not completed, but kept here only for testing purpose.

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