SOLUTION: can someone help me figure out how I multiply expressions like (7+9i)(5+i)

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Question 735957: can someone help me figure out how I multiply expressions like (7+9i)(5+i)
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
(7+9i)(5+i)
7(5+i)+9i(5+i)
35+7i+45i+9i^2
(i^2=-1): 9i^2=-9
26+52i