document.write( "Question 1075700: Please help me find (a)2v + u, (b)u -3v, and (c)5u - v in the equation of u = 2i + 3j, v = -i - 2j.
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Algebra.Com's Answer #690353 by ikleyn(52797) $\"\"$ $\"About$

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document.write( "(a)  2v + u = (-2i - 4j) + (2i + 3j) = (-2 + 2)i + (-4 + 3)j = 0*i + (-1)*j = -j .\r\n" );
document.write( "               --------     -------\r\n" );
document.write( "                  2v           u \r\n" );
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document.write( "(b)  u -3v = (2i + 3j) - (-3i - 6j) = (2 + 3)i + (3 + 6)j = 5i + 9j .\r\n" );
document.write( "              -------     ---------\r\n" );
document.write( "                 u            3v\r\n" );
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document.write( "(c)  5u - v = (10i + 15j) - (-i - 2j) = (10+1)i + (15 + 2)j = 11i + 17j .\r\n" );
document.write( "               ---------     -------\r\n" );
document.write( "                  5u            v\r\n" );
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