713 prompts matching "De Moivre's theorem used with a negative index"
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Explain back: completing the square when the coefficient of x squared is not one
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Learn: Factorising a quadratic whose coefficient of x squared is one
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Explain Back: The zero product rule, and why it works
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Final Revision: A word problem solved by factorising a quadratic
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Learn: Making the coefficient of x squared equal to one first
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Practice: Working through a quadratic by completing the square, step by step
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Explain Back: An answer left in surd form after completing the square
I have just studied an answer left in surd form after completing the square in my SS2 Furt
WAEC Prep: The minimum value of a quadratic found by completing the square
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Final Revision: Why completing the square always works
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Explain Back: Leaving the roots of a quadratic in surd form
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Learn: The sum of the roots as minus b over a
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Practice: Forming an equation from a given sum and product
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Explain Back: Finding a missing coefficient from a stated sum of roots
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WAEC Prep: Checking the sum and product against the solved roots
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Final Revision: One root twice the other, and what that gives
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Learn: What makes an expression in the roots symmetric
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Practice: The value of alpha to the fourth plus beta to the fourth
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Explain Back: The value of alpha minus beta, all squared
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WAEC Prep: Forming an equation whose roots are alpha plus one and beta plus one
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Final Revision: Using a symmetric function to find an unknown coefficient
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