document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=874973>Question 874973</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Given the following vectors:\r<BR>\n" );
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document.write( "b = -3i + 4j<BR>\n" );
document.write( "c = i - 2j<BR>\n" );
document.write( "e = -2j + k\r<BR>\n" );
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document.write( "Calculate (b + c) x e.\r<BR>\n" );
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document.write( "I've attempted this problem many times and I keep getting the answer 2i + 2j + 4k. The provided solution is 2i + 4k or (2, 0, 4).....\r<BR>\n" );
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document.write( "This is my working out..\r<BR>\n" );
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document.write( "b + c = (-3 + 1)i + (4 - 2)j = -2i + 2j\r<BR>\n" );
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document.write( "(b + c) x e = [(2*1)-(0*-2)]i - [(-2*1)-(0*0)]j + [(-2*-2)-(2*0)]k\r<BR>\n" );
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document.write( "= 2i + 2j + 4k\r<BR>\n" );
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document.write( "Please explain to me where I've gone wrong. Thank you in advance. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #527854 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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/cgi-bin/show-face.mpl?user=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=527854\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Given the following vectors:\r<BR>\n" );
document.write( "\n" );
document.write( "b = -3i + 4j<BR>\n" );
document.write( "c = i - 2j<BR>\n" );
document.write( "e = -2j + k<BR>\n" );
document.write( "Calculate (b + c) x e.\r<BR>\n" );
document.write( "\n" );
document.write( "I've attempted this problem many times and I keep getting the answer 2i + 2j + 4k. The provided solution is 2i + 4k or (2, 0, 4).....\r<BR>\n" );
document.write( "\n" );
document.write( "b + c = (-3 + 1)i + (4 - 2)j = -2i + 2j<BR>\n" );
document.write( "(b + c) x e = [(2*1)-(0*-2)]i - [(-2*1)-(0*0)]j + [(-2*-2)-(2*0)]k\r<BR>\n" );
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document.write( "= 2i + 2j + 4k<BR>\n" );
document.write( "Your answer is correct. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );