matgre Posted January 20, 2011 Posted January 20, 2011 Hello! Im new here so and in a hurry so I don't know if I'm posting at the right place but anyway here's my pickle! I'm trying to isolate y in this equation: (y^2) - 4y +10 = P anyone care to hint me ? I tried decomposition but it was in vain heheheeeeeeeee THanks!
timo Posted January 20, 2011 Posted January 20, 2011 (edited) EDIT: Sorry; I mis-read your equation. I am not completely sure that you want to isolate y, so I'll give you two options of what can be a sensible thing to do. 1) Solve for y -> quadratic formula. 2) Rearrange (y-something)^2 = something else. -> completing the square. Edited January 20, 2011 by timo
matgre Posted January 20, 2011 Author Posted January 20, 2011 (edited) Hmm Im not sure I understand option 2 but solving y with the quad formula should work. I would have to treat (10-P) as my constant C and solve for y! That should do the trick!? Edited January 20, 2011 by matgre
timo Posted January 20, 2011 Posted January 20, 2011 ^^ my original reply was crap since I mis-read your equation (didn't see that 4y has a "y" in it...). Sorry about that. See the now-modified post.
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