document.write( "Question 16705: find all values for k such that the equation 3x squared - 2x + k = 0 has imaginary roots \n" ); document.write( "
Algebra.Com's Answer #8209 by xcentaur(357)\"\" \"About 
You can put this solution on YOUR website!
3x^2 - 2x + k = 0\r
\n" ); document.write( "\n" ); document.write( "For imaginary roots, discriminant(D) must be less than zero.\r
\n" ); document.write( "\n" ); document.write( "D=b^2-4ac is the discriminant.\r
\n" ); document.write( "\n" ); document.write( "D= (-2)^2 -4(3)(k)
\n" ); document.write( " = 4 - 12k
\n" ); document.write( "This must be less than zero.\r
\n" ); document.write( "\n" ); document.write( "Therefore, 4 - 12k < 0
\n" ); document.write( "4<12k
\n" ); document.write( "1<3k
\n" ); document.write( "1/3\n" ); document.write( "\n" ); document.write( "Hence for all values of k which are less than 1/3,the roots will be imaginary.\r
\n" ); document.write( "\n" ); document.write( "

For k=1/3,roots will be real and equal. All values of k greater than 1/3 will result in real distinct roots.\r
\n" ); document.write( "\n" ); document.write( "

Hope this helps,
\n" ); document.write( "Prabhat \n" ); document.write( "

\n" );