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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Solving a Nice Quartic in Two Ways (x^4+x^3+x^2+x+1=0)
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Factoring Cubic Polynomials- Algebra 2 & Precalculus
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A Method for Radical Equation: A Surprising Twist | Chinese Math Olympiad
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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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Special Tricks to Solve Diophantine Equation | Chinese Math Olympiad
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