document.write( "Question 1187303: Let f(x)=x^2+6x\r
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Algebra.Com's Answer #818252 by MathLover1(20850) $\"\"$ $\"About$

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Let $\"f%28x%29=x%5E2%2B6x\"$ \r
\n" ); document.write( "\n" ); document.write( "Evaluate $\"f%282%29\"$ =\r
\n" ); document.write( "\n" ); document.write( " $\"f%282%29=2%5E2%2B6%2A2\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"f%282%29=16\"$ \r
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\n" ); document.write( "\n" ); document.write( "Solve $\"f%28x%29=-9\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"-9=x%5E2%2B6x\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"0=x%5E2%2B6x%2B9\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"0=%28x+%2B+3%29%5E2\"$ \r
\n" ); document.write( "\n" ); document.write( "solutions: $\"x+=+-3\"$ (multiplicity 2, or a double root)\r
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