What do these equations of parabolas represent? Confused..10 pts
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What do these equations of parabolas represent? Confused..10 pts

[From: ] [author: ] [Date: 11-05-06] [Hit: ]
......
y=a(x-h)^2+k

(x-h)^2=4p(y-k)

(y-k)^2=4p(x-h)

How are the first two equations equivalent?

-
y = a(x-h)² + k
y-k = a(x-h)²
(x-h)² = (1/a)(y-k)
which is equivalent to
(x-h)² = 4p(y-k)
if 4p = 1/a
1
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