Find (a) the directrix, (b) the focus, (c) the roots of the parabola y = x^2 -5x + 4. I have never seen a parabola written that way.
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Originally Posted by magentarita Find (a) the directrix, (b) the focus, (c) the roots of the parabola y = x^2 -5x + 4. I have never seen a parabola written that way. You're probably used to seeing the quadratic written in vertex form like: Now, just complete the square: Vertex Directrix: Focus: Roots (zeros): Factor and solve for x.
Originally Posted by masters You're probably used to seeing the quadratic written in vertex form like: Now, just complete the square: Vertex Directrix: Focus: Roots (zeros): Factor and solve for x. This is exactly what confused me. I thank you for making life easy here for me.
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