for what valus of k does x^2 + (k+2)x + (k+2) = 0 have equal roots??

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- December 7th 2009, 07:55 PMdeej813maths - roots of equation
for what valus of k does x^2 + (k+2)x + (k+2) = 0 have equal roots??

- December 7th 2009, 07:58 PMpickslides
- December 7th 2009, 08:00 PMdeej813
um ok

can you explain how?

so what values of k?? - December 7th 2009, 08:03 PMTheEmptySet
- December 7th 2009, 08:06 PMdeej813
so its when k is + or - 2

- December 8th 2009, 09:15 PMT. Studentroots
You are correct. There will be two parabolas with one root each. Each parabola has a vertex touching the x-axis.