document.write( "Question 248026: I solved the equation
\n" ); document.write( "x^2-8x-9<=0
\n" ); document.write( "as
\n" ); document.write( "-1<=x<=9\r
\n" ); document.write( "\n" ); document.write( "I don't know how to write that in interval notation.
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Algebra.Com's Answer #180796 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
The general inequality \"a%3C=x%3C=b\" can be written as in interval notation. So just substitute in a=-1 and b=9 to rewrite \"-1%3C=x%3C=9\" into \n" ); document.write( "
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