SOLUTION: Find the vertex, focus and directrix of the parabola given by the equaiton (y + 2)^2 + -4(x-1)
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Question 857859: Find the vertex, focus and directrix of the parabola given by the equaiton (y + 2)^2 + -4(x-1)
Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!
You are missing something. There should be an equal sign somewhere.
Maybe you meant to type
(y + 2)^2 = -4(x-1) and got a + sign instead of the intended = sign.
<-->
is the equation of a parabola with a horizontal axis of symmetry,
<--> ,
and the vertex at (1,-2).
The focal distance is ,
and the focus and the rest of the parabola are to the left.
So the focus is at (0,-2),
unit to the left of (1,-2),
and the directrix is the line ,
unit to the left of (1,-2).
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