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# How can you go from -1/p-2 to 1/2-p? the problem I got this

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CEO
Joined: 29 Mar 2007
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How can you go from -1/p-2 to 1/2-p? the problem I got this [#permalink]  15 Aug 2007, 21:45
How can you go from

-1/p-2 to 1/2-p? the problem I got this from is the a slope of the line problem however the slope has NOT been flipped yet for a perpendicular line. I must be missing some basic concept here... I mean did they just multiply the top and bottom by -1???

original part: 2-3/p-2= -1/p-2 = 1/2-p??? when flipped for the other slope it comes out to p-2.

I did it this way. 2-3/p-2 =-1/p-2 then I need to flip the slope to get the slope of the perpendicular line so

-(1/-1/p-2) --> -(p-2/-1) --> p-2...

Its late and honestly, I just wanna see if my head is one straigt...
Director
Joined: 12 Jul 2007
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yup, just multiply the top and bottom by -1.
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