document.write( "Question 245722: How to solve 2x^2 + 1 = 0 using imaginary/complex numbers \n" ); document.write( "
Algebra.Com's Answer #180355 by richwmiller(17219)\"\" \"About 
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2x^2=-1
\n" ); document.write( "divide by 2
\n" ); document.write( "x^2=-1/2
\n" ); document.write( "this is where imaginary numbers come in.
\n" ); document.write( "get sqrt of both sides\r
\n" ); document.write( "\n" ); document.write( "x=+\- i/sqrt(2) where i=sqrt(-1)
\n" ); document.write( "x=+ i/sqrt(2)
\n" ); document.write( "x=- i/sqrt(2)
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