Evaluating the Product of Polynomials: (x-a)(x-b)(x-c)...

AI Thread Summary
The discussion revolves around the expansion of the polynomial expression (x-a)(x-b)(x-c) and its simplification. Initially, the expansion is presented in a convoluted manner, leading to confusion among participants. After some back-and-forth, the correct simplified form of the polynomial is derived as x^3 - (a+b+c)x^2 + (ab + ac + bc)x - abc. The conversation highlights the importance of clarity in mathematical communication, with one participant suggesting that clearer notation would have improved understanding. There is also a mention of a specific case where the product equals zero due to the term (x-x), indicating a misunderstanding of the original intent behind the expression. Overall, the thread emphasizes the need for precision in algebraic expressions and the potential for misinterpretation when clarity is lacking.
vikasj007
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well i could not get anything really mibd boggling, so u will have to put up with this one

what is the product of:

(x-a)(x-b)(x-c)..... = ?
 
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(x^2 - bx - ax + ab)(x-c)

= x^3 - cx^2 - bx^2 + cbx - ax^2 +cax + abx - cab

What the hell was the point? Basic algebra, without even a nice expansion.

EDIT *sigh*, yeah ok, had to collect terms, it looked so bad otherwise:

= x^3 - (a+b+c)x^2 + (ab + ac + bc)x - abc
 
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Haha, haven't seen that one in a long time :smile:

(x - a)(x - b) ... (x - x)(x - y)(x - z) = 0

since x - x = 0
 
what in the world was cepheid trying to do?

next time try to read carefully.
 
vilkasj007, u should have written it more clearly. something like this:
(x-a)(x-b)...(x-y)(x-z) = ?
 
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