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try \[\sqrt{x+9}+2=1\]

That worked, thanks!
to be sure, is the solution x=-7?

and when I tried to see if it was extraneous, I got 4=-1

there is no solution, but i guess the "extraneous" one would be \(-8\)

Sorry, I'm confused. I solved the equation and got -7 haha

\[\sqrt{x+9}+2=1\\
\sqrt{x+9}=-1\\
x+9=1\\
x=-8\]

oh ok! I put -7 instead of 8 for some reason. Thanks!

yw