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Naz990 Naz990
  • 24-11-2014
  • Mathematics
Answered

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

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

Verified Answer :

konrad509
konrad509 konrad509
  • 24-11-2014

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

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