Question 396778: How do I use a graph to demonstrate the operation of these complex numbers?
1. (7-6i)+(-5-2i)
2. (5-9i)-(-3-12i)
Thank you for your help! Answer by richard1234(7193) (Show Source):
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 , which is equivalent to a vector with an x-component of 7 and a y-component of -6. You're adding which is another vector. To add them graphically, you could use the parallelogram rule or the head-to-tail method.
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!)
