755 prompts matching "The complement rule used in a counting problem"
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Distinguishing gradient sign: positive, negative, zero, undefined
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Reviewing all coordinate geometry formulas before a test
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Coordinate geometry involving a right-angle condition to find x
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Coordinate geometry applied to a triangle's area check
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Expanding a product of two brackets
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Expanding a product of three brackets
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Expanding and simplifying with negative brackets
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Factorising by taking out a common factor
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Factorising by grouping four terms
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Simplifying an algebraic fraction by factorising first
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Adding two algebraic fractions with different denominators
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Subtracting two algebraic fractions
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Multiplying two algebraic fractions
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Dividing algebraic fractions
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Simplifying a complex algebraic fraction
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Solving a double inequality
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Representing a solution set on a number line
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Solving simultaneous linear equations by substitution
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Solving simultaneous linear equations by elimination
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Substituting values into an algebraic expression
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