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Determine the​ vertex, focus, and directrix for the following parabola. A. y=4(x+2)^2-21 B. y-7=1/8(x-3)^2 C. x=1/4y^2

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Basic Math

Determine the​ vertex, focus, and directrix for the followingparabola.

A. y=4(x+2)^2-21

B. y-7=1/8(x-3)^2

C. x=1/4y^2

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