document.write( "Question 901773: Determine the vertex of the graph of the quadratic function f(x)=x2 +4 \n" ); document.write( "
Algebra.Com's Answer #546940 by harpazo(655)\"\" \"About 
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f(x)= x^2 + 4\r
\n" ); document.write( "\n" ); document.write( "x = -b/2a\r
\n" ); document.write( "\n" ); document.write( "Let b = 4 and a = 1 from the given function.
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\n" ); document.write( "x = -4/2(2)\r
\n" ); document.write( "\n" ); document.write( "x = -4/4\r
\n" ); document.write( "\n" ); document.write( "x = -1\r
\n" ); document.write( "\n" ); document.write( "Plug x = -1 into the given function.\r
\n" ); document.write( "\n" ); document.write( "f(-1) = (-1)^2 + 4\r
\n" ); document.write( "\n" ); document.write( "f(-1) = 1 + 4\r
\n" ); document.write( "\n" ); document.write( "f(-1) = 5\r
\n" ); document.write( "\n" ); document.write( "Vertex is (-1, 5).\r
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