Khan/khan-exercises — Issue #7677: Equation of a hyperbola - Answers with multiple forms.
Author: KhanBugz
Created: 2011-12-03 20:58:09+00:00
State: open
Labels: chrome, vista, wrong-or-unclear

Reporter: duhduhDavis@gmail.com

With the plus or minus sign, the equations:
y=(plus or minus)4(x+6)+4

and

y=(plus or minus)4(x-6)-4

are the same. However, this module does not allow for the first option I listed.

[equation_of_a_hyperbola.html?seed=163&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/equation_of_a_hyperbola.html?seed=163&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/equation_of_a_hyperbola.html?seed=163&problem=0&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5B%5C%224(x%2B6\)%2B4%5C%22%5D%22%2C305%5D%2C%5B%22hint-activity%22%2C%220%22%2C2%5D%2C%5B%22hint-activity%22%2C%220%22%2C4%5D%2C%5B%22hint-activity%22%2C%220%22%2C4%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%2C%5B%22correct-activity%22%2C%22%5B%5C%224(x-6)-4%5C%22%5D%22%2C57%5D%5D)

[["4(x+6)+4"],["4(x-6)-4"]]

Mozilla/5.0 (Windows NT 6.0; WOW64) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/15.0.874.121 Safari/535.2

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