document.write( "Question 396778: How do I use a graph to demonstrate the operation of these complex numbers?\r
\n" ); document.write( "\n" ); document.write( "1. (7-6i)+(-5-2i)\r
\n" ); document.write( "\n" ); document.write( "2. (5-9i)-(-3-12i)\r
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Algebra.Com's Answer #281530 by richard1234(7193) $\"\"$ $\"About$

You can put this solution on YOUR website!
Complex numbers add exactly like vectors do. For example, on the first question, you have the complex number $\"7-6i\"$ , which is equivalent to a vector with an x-component of 7 and a y-component of -6. You're adding $\"-5+-+2i\"$ which is another vector. To add them graphically, you could use the parallelogram rule or the head-to-tail method.\r
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\n" ); document.write( "\n" ); document.write( "The second one is similar, but you have to subtract the vectors instead. (Hint: vectors follow the commutative properties and other arithmetic properties as real numbers do!) \n" ); document.write( "

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