Factor: x^4 + x^3 - 4x^2 + x +1 | Olympiad Question
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Factor: (a + b - 2ab ) (a + b - 2) + (1 - ab)^2 | Olympiad Question
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Résoudre une équation de degré 4 x^4-x^3+2x^2-x+1=0 à l'aide du second degré - Première S ES STI
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How to solve a 5-term 4th degree polynomial equation x^4+x^3+x^2+x+1=0
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Solving Polynomial Equations By Factoring and Using Synthetic Division
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Factorización de polinomios: método de evaluación o Ruffini (Ejercicio 1)
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How to factor a hard 4th degree polynomial (no rational zero, can't do it by grouping)
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Smart Method: Solving Without Squaring First | Math Olympiad
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