Algebra-2

If a polynomial has roots , , , etc., then the factored form of the polynomial is  where  is a constant.

 

Given roots are , , and .

According to the Conjugate Root Theorem, if a polynomial has real coefficients and a complex number  is a root, then its complex conjugate  is also a root. Since  is a root,  must also be a root.

 

So the factored form of the quartic polynomial is .

Expanding this gives:

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