I could use some help doing this simple math problem lol.

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24-11-2014
Mathematics

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I could use some help doing this simple math problem lol.

Sagot :

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I NEED HELP please 25 points

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konrad509 konrad509 · Answer 1 · 2014-11-24T15:33:11-05:00

konrad509 konrad509

24-11-2014

[tex]D:k-9\geq 0 \wedge k\geq0\\ D:k\geq 9 \wedge k\geq0\\ D:k\geq 9\\ \sqrt{k-9}-\sqrt k=-1\\ \sqrt{k-9}=-1+\sqrt k\\ k-9=(-1+\sqrt k)^2\\ k-9=1-2\sqrt k+k\\ 2\sqrt k=10\\ \sqrt k =5\\ k=25 [/tex]

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