document.write( "Question 316860: Determine whether there is a maximum or minimum value for the given function, and find that value.
\n" ); document.write( " f(x) = x^2 + 8x + 13 \n" ); document.write( "

Algebra.Com's Answer #226766 by Fombitz(32388) $\"\"$ $\"About$

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Convert to vertex form by completing the square,
\n" ); document.write( " $\"f%28x%29+=+x%5E2+%2B+8x+%2B+13\"$
\n" ); document.write( " $\"f%28x%29+=+%28x%5E2+%2B+8x%2B16%29+-3\"$
\n" ); document.write( " $\"f%28x%29=%28x%2B4%29%5E2-3\"$
\n" ); document.write( "The minimum value occurs at the vertex.
\n" ); document.write( " $\"fmin=f%28-4%29=-3\"$
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