document.write( "Question 1013017: Solve: x^4 -3x^2 =4 (find 4 roots)\r
\n" ); document.write( "\n" ); document.write( "* I plugged it into my calculator and only got two root -2 and 2. There should be two more but how do you get the answers with i? (my classmate's answer for that are x=i and x= -i) \n" ); document.write( "

Algebra.Com's Answer #629169 by ikleyn(53937) $\"\"$ $\"About$

You can put this solution on YOUR website!
.
\n" ); document.write( "Solve: x^4 -3x^2 =4 (find 4 roots)
\n" ); document.write( "------------------------------------\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "

\r\n" );
document.write( " = ,\r\n" );
document.write( "\r\n" );
document.write( "Factor left side. You will get\r\n" );
document.write( "\r\n" );
document.write( " = .\r\n" );
document.write( "\r\n" );
document.write( "The roots are 2, -2, i and -i.\r\n" );
document.write( "

\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );