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Question

# \$1.00Find the focus of a parabola

• From Mathematics: Linear-Systems
• Closed, but you can still post tutorials
• Due on Mar. 19, 2010
• Asked on Mar 16, 2010 at 11:20:20PM

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Q:

find the focus of the parabola: y^2 -4y-4x=0

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The Correct Answer With Work Shown
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• Posted on Mar. 17, 2010 at 12:24:36AM
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A:
Preview: ... y 2 - 4y + 4 - 4x = 0 + 4   We are adding the square of (1/2 of -4) to both sides.   (-4/2) 2 = 4 (y - 2) 2 - 4x = 4   Factoring  y2  - ...

The full tutorial is about 197 words long plus attachments.

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graph.png (4K)

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Parabola
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• Posted on Mar. 17, 2010 at 12:27:19AM
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A:
Preview: ... y^2 -4y-4x=0 To solve this problem we must remember : the general equation of a parabola with ...

The full tutorial is about 79 words long .

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Focus of a parabola-solution with graph
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• Posted on Mar. 17, 2010 at 12:33:13AM
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A:
Preview: ... e at ...

The full tutorial is about 4 words long plus attachments.

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Parabola
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• Posted on Mar. 17, 2010 at 10:56:33AM
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