document.write( "Question 944912: What is an imaginary #, how to solve x^2-4x+8=0
\n" ); document.write( "In what way is the i or imaginery # involved.
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Algebra.Com's Answer #576179 by josgarithmetic(39838)\"\" \"About 
You can put this solution on YOUR website!
Try completing the square to help solve the equation. What do you find inside the square root function part of the solution?\r
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\n" ); document.write( "\n" ); document.write( "As reference, \"i%5E2=-1\", and from this \"i=-sqrt%28-1%29\" or \"i=sqrt%28-1%29\".\r
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\n" ); document.write( "\n" ); document.write( "\"x%5E2-4x%2B8=0\"
\n" ); document.write( "\"x%5E2-4x%2B4%2B8=4\", the 4 completes the square.
\n" ); document.write( "\"%28x-2%29%5E2%2B8=4\"
\n" ); document.write( "\"%28x-2%29%5E2=4-8=-4\"
\n" ); document.write( "\"x-2=0%2B-+sqrt%28-4%29\"
\n" ); document.write( "\"x=2%2B-+sqrt%28-4%29\"
\n" ); document.write( "\"highlight%28x=2%2B-+2sqrt%28-1%29%29\"\r
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\n" ); document.write( "\n" ); document.write( "Also for reference, study this:
\n" ); document.write( "http://www.algebra.com/my/Completing-the-Square-to-Solve-General-Quadratic-Equation.lesson?content_action=show_dev
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