1,326 prompts matching "What the formula gives when the discriminant is nought"
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WAEC Prep: Forming an equation whose roots are each two more than the original
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Show All Working: Solving a quadratic by completing the square
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Common Mistakes: Proving that a quadratic expression is positive for every real x
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Practice: Finding alpha minus beta from the sum and the product
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Spot My Mistake: Forming an equation whose roots are alpha squared and beta squared
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WAEC Prep: Sketching a cubic from its factorised form
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Show All Working: Solving a cubic equation by factorisation
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Common Mistakes: Adding, subtracting and multiplying two polynomials
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Quiz: The product of the roots of a cubic
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Common Mistakes: Three roots in geometric progression in a cubic
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Practice: Solving an inequality with the unknown in the denominator
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Quiz: The number of arrangements of r objects chosen from n
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Explain Back: Arrangements in which two particular objects must stay together
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Spot My Mistake: Arrangements in which two particular objects must be kept apart
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WAEC Prep: Pascal's triangle and the combination numbers in it
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Show All Working: Counting the handshakes, or the lines joining n points
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Common Mistakes: Selections in which at least one of a kind must appear
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Final Revision: Proving an identity by working on one side only
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Spot My Mistake: Solving an equation by first applying a Pythagorean identity
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Show All Working: Solving a cos x plus b sin x equals c by the R method
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