document.write( "Question 540645: Identify the vertex and the axis of symmetry of the quadratic function.
\n" ); document.write( "f(x)=(x+8)^2-7\r
\n" ); document.write( "\n" ); document.write( "The vertex is:
\n" ); document.write( "The axis of symmetry is: \n" ); document.write( "

Algebra.Com's Answer #353820 by oberobic(2304) $\"\"$ $\"About$

You can put this solution on YOUR website!
f(x) = (x+8)^2 -7
\n" ); document.write( "f(x) = x^2 +16x + 64 -7
\n" ); document.write( "f(x) = x^2 +16x + 57
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\n" ); document.write( " $\"+graph%28500%2C500%2C-12%2C5%2C-12%2C5%2Cx%5E2%2B16x%2B57%29+\"$
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\n" ); document.write( "The axis is symmetry is defined by x = -b/2a
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\n" ); document.write( "-b/2a = -16/2 = -8
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\n" ); document.write( "The vertex is found by finding f(x) for x = -8.
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\n" ); document.write( "f(x) = (-8)^2 +16(-8) + 57
\n" ); document.write( "f(x) = 64 -128 + 57
\n" ); document.write( "f(x) = -7
\n" ); document.write( ".
\n" ); document.write( "Vertex = (-8,-7)
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\n" ); document.write( "Done. \n" ); document.write( "

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