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posted by BC Sunday, September 12, 2010 at 7:42pm.

Simplify: (1 + i)(1 - i) Answer a. -2i b. 2 c. 2i d.-2

(1)(1 - i) + (i)(1 - i) now simplify. note: i^2=-1

1 - i + i -i^2 = 1 - (-1) = ?

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