1,325 prompts matching "A word problem solved with the quadratic formula"
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Common Mistakes: Showing that intersection distributes over union
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Practice: Testing a binary operation for associativity
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Show All Working: Solving an equation written in terms of a binary operation
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Common Mistakes: A binary operation defined by arithmetic modulo n
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Worked Example: Collecting like surds in a single sum
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Worked Example: Simplifying an expression carrying both a negative and a fractional index
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Practice: Converting between index form and logarithm form
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Common Mistakes: Solving an exponential equation using logarithms
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Worked Example: Finding one over alpha plus one over beta
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Worked Example: Evaluating a polynomial by substitution
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Practice: Factorising a cubic completely once one factor is known
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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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Show All Working: Three roots in arithmetic progression in a cubic
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Common Mistakes: Three roots in geometric progression in a cubic
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Show All Working: Solving a pair of simultaneous linear inequalities
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Practice: Choosing a committee that must contain one particular person
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Common Mistakes: Selections in which at least one of a kind must appear
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Worked Example: Solving cos x equals a negative value, and finding both solutions
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Common Mistakes: Identifying a conic from a general second-degree equation
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