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Taking a 1 out of the fraction on the left looks like it would help.
From there, solve the quadratic equation twice (first with 2 on the right and then with -2).
If you're working in the reals, I think you only get one solution.
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first simplify this expression
by usining division by -1 you will find f(x) = 0
thats means -1 is the first zero
you will get
divide by -1 again
and you can complete the answer
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I think I prefer mathsyperson's method, it's shorter and doesn't require you to guess a root
The roots from mathsyperson's quadratic are -1 and -1 ± 2i, which are the same as yours saudi_boy.
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we can see x^2+2x+3<>o with any x belong to R
let
*
Last edited by phamthephong100 (2008-01-30 17:49:03)
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