Homework Help: Pre Calculus

Posted by James on Monday, June 15, 2009 at 10:03pm.

Simplify 2(3-i^14)- (5-i^23)
3-i

Simplify: (5-3i)^2
16+30i

Simplify (3+2i) / (4-5i)
(2/41)-(23/41)i

is this right?

Pre Calculus - Reiny, Monday, June 15, 2009 at 10:50pm
the second one should be
(5-3i)^2
= 25 - 30i + 9i^2
= 16 - 30i

the other two are correct

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