SOLUTION: how do you solve this (4 - 7i)(4 + 7i)

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Question 371576: how do you solve this (4 - 7i)(4 + 7i)
Found 2 solutions by Alan3354, Fombitz:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
You don't. It's not an equation and there are no variables.

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Use the FOIL method,
+%284+-+7i%29%284+%2B+7i%29+=16%2B28i-28i-49i%5E2
+%284+-+7i%29%284+%2B+7i%29+=16%2B49
+%284+-+7i%29%284+%2B+7i%29+=highlight%2866%29