document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=193128>Question 193128</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi. I just started learning complex numbers and I need help understanding how <BR>\n" );
document.write( "to do the following problems please=]\r<BR>\n" );
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document.write( "#1)  2x^2+9=-41\r<BR>\n" );
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document.write( "#2)  3s^2-1=7s^2\r<BR>\n" );
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document.write( "#3)  -6(u + 5)^2=120\r<BR>\n" );
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document.write( "#4)  (2 - 6i)-(10 + 4i)\r<BR>\n" );
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document.write( "Thank You so much,<BR>\n" );
document.write( "Lynda=] </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #144968 by </B><A HREF=/tutors/aboutme.mpl?userid=RAY100><B>RAY100(1637)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=RAY100><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=144968\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> remember  sqrt  (-1)=i\r<BR>\n" );
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document.write( "1)  2x^2+9=-41<BR>\n" );
document.write( "2x^2=-50<BR>\n" );
document.write( "x^2=-25<BR>\n" );
document.write( "x=+/- 5i\r<BR>\n" );
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document.write( "2)3s^2-1=7s^2<BR>\n" );
document.write( "-1=4s^2<BR>\n" );
document.write( "-(1/4) =s^2<BR>\n" );
document.write( "+/- (1/2) i =s\r<BR>\n" );
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document.write( "3)  -6(u+5)^2=120<BR>\n" );
document.write( "(u+5)^2=-20<BR>\n" );
document.write( "u^2+10u+25=-20<BR>\n" );
document.write( "u^2+10u+45=0<BR>\n" );
document.write( "solve  using  quadratic  eqn<BR>\n" );
document.write( "a=1,,,b=10,,,,c=45<BR>\n" );
document.write( "u=  (-10 +/-sqrt ((10)^2-4(1)(45)))/2(1)<BR>\n" );
document.write( "u=  (-10+/-sqrt (100-180))/2<BR>\n" );
document.write( "u= (-10+/-sqrt(-80))/2<BR>\n" );
document.write( "u= (10+/-8.94i)/2<BR>\n" );
document.write( "u=5+/-4.47i\r<BR>\n" );
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document.write( "4)  (2-6i)-(10+4i)<BR>\n" );
document.write( "(-8)-10i </SPAN>\n" );
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