821 prompts matching "Structured question: find k so a cubic has a repeated root"
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Find alpha squared plus beta squared using sum and product
I am in SS 2. Give me an Additional Maths style question where I know alpha+beta and alpha
Common Mistakes: Writing down the roots once the brackets are found
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Learn: The sum of the roots as minus b over a
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Worked Example: The product of the roots as c over a
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Common Mistakes: Roots that are reciprocals of one another
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Learn: What makes an expression in the roots symmetric
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Learn: Setting out the division of a cubic by a linear expression
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Worked Example: Testing a list of candidates to find a factor
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Learn: Factorising a cubic into three linear factors
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Worked Example: Factorising a cubic into a linear and a quadratic factor
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Common Mistakes: A cubic equation arising from a volume problem
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Worked Example: Finding the fifth term of an expansion
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IGCSE Additional Maths Y11: Finding every angle in a range with a given sine — Common Mistakes
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IGCSE Additional Maths Y11: Equating coefficients to find an unknown constant — Common Mistakes
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IGCSE Additional Maths Y11: Finding the ratio in which two lines cut one another — Common Mistakes
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IGCSE Additional Maths Y11: Finding a curve from its gradient function and one point — Common Mistakes
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WAEC-style factorisation question
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Solve x^2 + 5x + 6 = 0 by factorisation
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Solve x^2 - 7x + 12 = 0 by factorisation
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Solve 2x^2 + 7x + 3 = 0 by factorisation
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