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tiny-tim
#5
Nov28-08, 05:57 AM
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Quote Quote by thomas49th View Post
Ahh yes i can see i made a istake in the numerator however I dont see how the denominator can be a - 1?:
(a-i)(a+i)
= a + ai - ai - i
= a -1

Does i x i always = 1 regardless of what the sign before it is?

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No (a-i)(a+i)
= a + ai - ai - i
= a + 1.

i x i always = -1 regardless of what the sign before it is!