An archway will be constructed over a walkway. A piece of wood will need to be curved to match a parabola. Explain to Maurice how to find the equation of the parabola given the focal point and the directrix (8).
d = (square root) (Xv2 - 3)^2 + (Yv2 - 6)^2
d = (square root) (Yv2 - 8)^2
I need to something like -1/-8x^2 + 5/4x + 23/8 = y
(example given by school)
Its to do an arc.
I got to Xv2^2 -6Xv2 + 9 + Yv2^2 -8Yv2 + 16 = ???

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