document.write( "Question 611909: Find the x-intercept(s) and the coordinates of the vertex for the parabola y = x^2-2x-8. If there is more than one x-intercept, separate them with commas.
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Algebra.Com's Answer #385193 by lwsshak3(11628)\"\" \"About 
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Find the x-intercept(s) and the coordinates of the vertex for the parabola y = x^2-2x-8. If there is more than one x-intercept, separate them with commas.
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\n" ); document.write( "y = x^2-2x-8
\n" ); document.write( "complete the square
\n" ); document.write( "y = (x^2-2x+1)-8-1
\n" ); document.write( "y = (x-1)^2-9
\n" ); document.write( "vertex: (1,-9)
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\n" ); document.write( "set y=0
\n" ); document.write( "(x-1)^2-9=0
\n" ); document.write( "(x-1)^2=9
\n" ); document.write( "(x-1)=±√=±√9=±3
\n" ); document.write( "x=-2,4\r
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