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Utilicemos la siguiente identidad
![(a+b+c)^5\equiv\\ \\
a^5+b^5+c^5+5(a+b)(a+c)(b+c)(a^2+b^2+c^2+ab+ac+bc)
(a+b+c)^5\equiv\\ \\
a^5+b^5+c^5+5(a+b)(a+c)(b+c)(a^2+b^2+c^2+ab+ac+bc)](https://tex.z-dn.net/?f=%28a%2Bb%2Bc%29%5E5%5Cequiv%5C%5C+%5C%5C%0Aa%5E5%2Bb%5E5%2Bc%5E5%2B5%28a%2Bb%29%28a%2Bc%29%28b%2Bc%29%28a%5E2%2Bb%5E2%2Bc%5E2%2Bab%2Bac%2Bbc%29%0A)
entonces
![a=3x+y-5z\\
b=2z-y-2x\\
c=3z-x\\ \\
\texttt{Vemos que }a+b+c=0\texttt{ por ende:}\\ \\
0^5=a^5+b^5+c^5+5(a+b)(a+c)(b+c)(a^2+b^2+c^2+ab+ac+bc)\\ \\
a^5+b^5+c^5=-5(a+b)(a+c)(b+c)(a^2+b^2+c^2+ab+ac+bc)\\ \\
\texttt{adem\'as: }(a+b+c)^2=0\to a^2+b^2+c^2=-2(ab+bc+ac)\\ \\ \\
\texttt{por consiguiente:}\\ \\
a^5+b^5+c^5+5=5(a+b)(a+c)(b+c)(ab+ac+bc)\\ \\ \\
a+b=x-3z\,,\, a+c=2x+y-2z\,,\, b+c=-x-y+5z\\ \\ \\
\texttt{luego uno de los factores es }\boxed{a+c=2x+y-2z}
a=3x+y-5z\\
b=2z-y-2x\\
c=3z-x\\ \\
\texttt{Vemos que }a+b+c=0\texttt{ por ende:}\\ \\
0^5=a^5+b^5+c^5+5(a+b)(a+c)(b+c)(a^2+b^2+c^2+ab+ac+bc)\\ \\
a^5+b^5+c^5=-5(a+b)(a+c)(b+c)(a^2+b^2+c^2+ab+ac+bc)\\ \\
\texttt{adem\'as: }(a+b+c)^2=0\to a^2+b^2+c^2=-2(ab+bc+ac)\\ \\ \\
\texttt{por consiguiente:}\\ \\
a^5+b^5+c^5+5=5(a+b)(a+c)(b+c)(ab+ac+bc)\\ \\ \\
a+b=x-3z\,,\, a+c=2x+y-2z\,,\, b+c=-x-y+5z\\ \\ \\
\texttt{luego uno de los factores es }\boxed{a+c=2x+y-2z}](https://tex.z-dn.net/?f=a%3D3x%2By-5z%5C%5C%0Ab%3D2z-y-2x%5C%5C%0Ac%3D3z-x%5C%5C+%5C%5C%0A%5Ctexttt%7BVemos+que+%7Da%2Bb%2Bc%3D0%5Ctexttt%7B+por+ende%3A%7D%5C%5C+%5C%5C%0A0%5E5%3Da%5E5%2Bb%5E5%2Bc%5E5%2B5%28a%2Bb%29%28a%2Bc%29%28b%2Bc%29%28a%5E2%2Bb%5E2%2Bc%5E2%2Bab%2Bac%2Bbc%29%5C%5C+%5C%5C%0Aa%5E5%2Bb%5E5%2Bc%5E5%3D-5%28a%2Bb%29%28a%2Bc%29%28b%2Bc%29%28a%5E2%2Bb%5E2%2Bc%5E2%2Bab%2Bac%2Bbc%29%5C%5C+%5C%5C%0A%5Ctexttt%7Badem%5C%27as%3A+%7D%28a%2Bb%2Bc%29%5E2%3D0%5Cto+a%5E2%2Bb%5E2%2Bc%5E2%3D-2%28ab%2Bbc%2Bac%29%5C%5C+%5C%5C+%5C%5C%0A%5Ctexttt%7Bpor+consiguiente%3A%7D%5C%5C+%5C%5C%0Aa%5E5%2Bb%5E5%2Bc%5E5%2B5%3D5%28a%2Bb%29%28a%2Bc%29%28b%2Bc%29%28ab%2Bac%2Bbc%29%5C%5C+%5C%5C+%5C%5C%0Aa%2Bb%3Dx-3z%5C%2C%2C%5C%2C+a%2Bc%3D2x%2By-2z%5C%2C%2C%5C%2C+b%2Bc%3D-x-y%2B5z%5C%5C+%5C%5C+%5C%5C%0A%5Ctexttt%7Bluego+uno+de+los+factores+es+%7D%5Cboxed%7Ba%2Bc%3D2x%2By-2z%7D%0A%0A)
entonces
rossanghela:
Buisss! Sensei, pero esa es la única manera de resolverlo?
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