Question 395851
What is the product of the complex numbers 
(3+i) and (3-i)
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Use FOIL:
F: 3*3 = 9
O: 3*-i = -3i
I; 3*i  =  3i
L: i*-i = i^4 = 1
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Combine to get 9+1 = 10
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Cheers,
Stan H.
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A) 8
B) 10
C) 9-i
D) 10-6i