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rpray2007 · Apr 10, 2012, 04:59 PM

Would be glad to help and if you tell us where you are stuck, we're more than happy to help.

Basically, you have to use your standard quadratic formula

$x{\small_1}=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

In your case, $k$ is the same as $b$ and $a$ is $-1$

Good luck.