document.write( "Question 75311This question is from textbook Alegbra 2 An Incremental Development
\n" ); document.write( ": Please help to complete the square and graph : \r
\n" ); document.write( "\n" ); document.write( "y = x^2 + 2x - 1\r
\n" ); document.write( "\n" ); document.write( "thank you \n" ); document.write( "
Algebra.Com's Answer #54076 by ankor@dixie-net.com(22740)\"\" \"About 
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Please help to complete the square and graph :
\n" ); document.write( "y = x^2 + 2x - 1
\n" ); document.write( ":
\n" ); document.write( "Put it in the \"complete the square\" arrangement
\n" ); document.write( "x^2 + 2x + ___ = +1
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\n" ); document.write( "The 3rd term is equal to the coefficient of x divide by 2 and then squared:
\n" ); document.write( "2/2 = 1, 1^2 = 1
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\n" ); document.write( "x^2 + 2x + 1 = 1 + 1; added 1 to both sides, to maintain equality
\n" ); document.write( "x^2 + 2x + 1 = 2
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\n" ); document.write( "(x + 1)^2 = 2: factored the perfect square
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\n" ); document.write( "x + 1 = +-\"sqrt%282%29\"; the square root of both sides
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\n" ); document.write( "x = -1 +-\"sqrt%282%29\"; subtracted 1 from both sides
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\n" ); document.write( "x = -1 + \"sqrt%282%29\"; approx +.414
\n" ); document.write( "and
\n" ); document.write( "x = -1 - \"sqrt%282%29\"; approx -2.414
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\n" ); document.write( "The graph:
\n" ); document.write( "\"+graph%28+300%2C+200%2C+-6%2C+6%2C+-6%2C+8%2C+x%5E2+%2B+2x+-+1%29+\"
\n" ); document.write( ":
\n" ); document.write( "Plot the the graph, solving for y using the equation; x^2 + 2x -1
\n" ); document.write( "the table should look like this
\n" ); document.write( " x | y
\n" ); document.write( "-------
\n" ); document.write( "-4 |+7
\n" ); document.write( "-3 |+2
\n" ); document.write( "-2 |-1
\n" ); document.write( "-1 |-2
\n" ); document.write( " 0 |-1
\n" ); document.write( "+1 |+2
\n" ); document.write( "+2 |+7
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\n" ); document.write( "Note the value of the x intercepts
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\n" ); document.write( "Did you follow this? Any questions? \n" ); document.write( "
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