SOLUTION: how do you do {{{(3+4i)(3-4i)}}}

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Question 242583: how do you do %283%2B4i%29%283-4i%29
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
how do you do %283%2B4i%29%283-4i%29
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Use FOIL:
F: 3*3 = 9
O:3*-4i = -12i
I:4i*3 = 12i
L:4i*-4i = -16i^2 = 16
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Combine to see the answer:
9 + 16 = 25
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Cheers,
Stan H.