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

Algebra ->  Quadratic-relations-and-conic-sections -> SOLUTION: i need to find the directrix, focus and roots of the parabola. y=x^2-5x+4. please help me if possible. thanks      Log On


   

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) About Me  (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