1,045 prompts matching "De Morgan's law that the complement of a union is the intersection of the comple"
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Quiz: Completing the square on x squared plus 6x
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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
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Spot My Mistake: Completing the square when the roots are not real
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Final Revision: Why completing the square always works
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Spot My Mistake: What the formula gives when the discriminant is nought
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Final Revision: A word problem solved with the quadratic formula
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Quiz: Finding the sum and the product without solving the equation
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Learn: What makes an expression in the roots symmetric
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WAEC Prep: A pair that gives no real solution at all
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Practice: The condition for the line to be a tangent
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Explain Back: The condition for the line never to meet the curve
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Quiz: The leading term and the constant term
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Spot My Mistake: A polynomial written in descending powers
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WAEC Prep: Expressions that are not polynomials, and why not
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Spot My Mistake: Finding two coefficients from two remainder conditions
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Worked Example: Testing a list of candidates to find a factor
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Spot My Mistake: The factor theorem applied to a quartic
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Final Revision: A factor theorem question set in the WAEC style
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Spot My Mistake: Finding the remaining roots once one is known
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