SOLUTION: i need to find the directrix, focus and roots of the parabola. y=x^2-5x+4. please help me if possible. thanks

SOLUTION: i need to find the directrix, focus and roots of the parabola. y=x^2-5x+4. please help me if possible. thanks

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Question 282460: i need to find the directrix, focus and roots of the parabola. y=x^2-5x+4. please help me if possible. thanks
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!

For the general parabola with axis parallel (or coincident with) the

-axis, namely:

the directrix is the line:

the focus is the point:

and the roots are:

For your problem,

,

, and

Just plug in the coefficient values and do the arithmetic.

John

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