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October 21, 2025, 08:31:07 pm
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Author Topic: intersection  (Read 2160 times)  Share 

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fredrick

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intersection
« on: January 19, 2008, 09:46:11 pm »
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hello, find the coordinates of the intersection  of the 2 curves and .

i got the 2 equations into standard form(is that what you call it?)



am i doing it right? if so wat now?

cheers!
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Collin Li

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Re: intersection
« Reply #1 on: January 19, 2008, 10:10:33 pm »
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I would have subtracted the first curve by the second curve multiplied by 4 to yield:



This would get an expression for y in terms of x, then I would substitute it back into either expression to get the intersections.
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Ahmad

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Re: intersection
« Reply #2 on: January 19, 2008, 10:11:19 pm »
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A systematic way would be to divide the first one by 4, then set the equations equal to each other (since they're both equal to 0), which will result in a linear equation. Substitute y in terms of x from this linear equation into the second equation and solve for x. :)
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fredrick

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Re: intersection
« Reply #3 on: January 19, 2008, 10:21:49 pm »
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ok i ended up with no real solution?
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Ahmad

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Re: intersection
« Reply #4 on: January 19, 2008, 10:25:33 pm »
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Mandark: Please, oh please, set me up on a date with that golden-haired angel who graces our undeserving school with her infinite beauty!

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fredrick

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Re: intersection
« Reply #5 on: January 19, 2008, 10:29:16 pm »
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oh lol wat an idiot :-[
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Ahmad

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Re: intersection
« Reply #6 on: January 19, 2008, 10:43:20 pm »
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Nah, don't worry about it, happens to everyone sometimes. :)
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enwiabe

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Re: intersection
« Reply #7 on: January 19, 2008, 11:38:37 pm »
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Happened to me on specialist exam 1. Evaluated quadratic formula incorrectly. :(
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fredrick

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Re: intersection
« Reply #8 on: January 20, 2008, 10:01:42 pm »
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Quote from: enwiabe on January 19, 2008, 11:38:37 pm
Happened to me on specialist exam 1. Evaluated quadratic formula incorrectly. :(
ouch lol
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enwiabe

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Re: intersection
« Reply #9 on: January 20, 2008, 10:42:14 pm »
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The difference between <45 and >45. :(
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