document.write( "Question 250561: Indicate the axis of symmetry of the parabola
\n" ); document.write( "y = x^2 + 8x + 20
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Algebra.Com's Answer #182446 by richwmiller(17219)\"\" \"About 
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If your equation is in vertex form, then the axis of is\r
\n" ); document.write( "\n" ); document.write( " x= h in the general vertex form equation y = (x-h)2 + k\r
\n" ); document.write( "\n" ); document.write( "If your equation is in standard form, then the formula for the axis of symmetry is:\r
\n" ); document.write( "\n" ); document.write( " x = -b/2a from the general standard form equation y = ax2+bx + c\r
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