document.write( "Question 846667: Factor the polynomial completely.
\n" ); document.write( "9+8x-x^2\r
\n" ); document.write( "\n" ); document.write( "I've done it, but I know it's not right. Here's what I have: \r
\n" ); document.write( "\n" ); document.write( "9+8x+x^2
\n" ); document.write( "-x^2-x+9x+9
\n" ); document.write( "(-x^2+9)+ (-x+9)
\n" ); document.write( "-x(x+9)+-1(x+9)
\n" ); document.write( "(x+9)(-x-1)\r
\n" ); document.write( "\n" ); document.write( "Thank you for your help!
\n" ); document.write( "

Algebra.Com's Answer #509887 by josh_jordan(263)\"\" \"About 
You can put this solution on YOUR website!
The easiest way to factor this is by first rewriting into standard form:\r
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\n" ); document.write( "\n" ); document.write( "-x^2 + 8x + 9 \r
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\n" ); document.write( "\n" ); document.write( "Next, factor out the negative from the expression, which will make this even easier to factor:\r
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\n" ); document.write( "\n" ); document.write( "-(x^2 - 8x - 9)\r
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\n" ); document.write( "\n" ); document.write( "Now, we can easily factor the expression inside the parenthesis:\r
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\n" ); document.write( "\n" ); document.write( "-(x - 9)(x + 1)
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