document.write( "Question 747569: Complete the square as an aid in graphing: y = x^2 + 4x - 2 \r
\n" ); document.write( "\n" ); document.write( "After completed the square, graph the parabola. \r
\n" ); document.write( "\n" ); document.write( "Please show all work so I can understand.
\n" ); document.write( " \n" ); document.write( "
Algebra.Com's Answer #455057 by ankor@dixie-net.com(22740)\"\" \"About 
You can put this solution on YOUR website!
Complete the square as an aid in graphing: y = x^2 + 4x - 2
\n" ); document.write( "Subtract 2 from both sides
\n" ); document.write( "x^2 + 4x + ___ = 2
\n" ); document.write( "Find the value that completes the square.
\n" ); document.write( "This is half of coefficient of x, squared, therefore 2^2 = 4, add to both sides
\n" ); document.write( "x^2 + 4x + 4 = 2 + 4
\n" ); document.write( "x^2 + 4x + 4 = 6
\n" ); document.write( "Which is
\n" ); document.write( "(x+2)^2 = 6
\n" ); document.write( "Find the square root of both sides
\n" ); document.write( "x + 2 = +/-\"sqrt%286%29\"
\n" ); document.write( "Two solutions
\n" ); document.write( "x = -2 - \"sqrt%286%29\"; about -4.45
\n" ); document.write( "and
\n" ); document.write( "x = -2 - \"sqrt%286%29\"; about +.45
\n" ); document.write( ":
\n" ); document.write( "After completed the square, graph the parabola.
\n" ); document.write( "we know the parabola crosses the x axis at +.45 and -4.45, looks like this
\n" ); document.write( "\"+graph%28+300%2C+200%2C+-6%2C+5%2C+-10%2C+10%2C+x%5E2%2B4x-2%29+\" \n" ); document.write( "
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