755 prompts matching "The range of values of x for which an expression stays positive"
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Gradient of a line joining two points
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Condition for two lines to be parallel
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Condition for two lines to be perpendicular
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Length of a line segment on a graph
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Coordinate geometry combined with simultaneous equations
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Reviewing all coordinate geometry formulas before a test
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Locus problem: points equidistant from two fixed points
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Full worked exam-style problem combining gradient, distance and midpoint
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Expanding and simplifying with negative brackets
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Factorising a quadratic with a coefficient in front of x squared
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Algebraic long division of a simple polynomial by a linear factor
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Common sign errors in algebraic manipulation
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Learn: Telling a rational number from an irrational one
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Practice: Deciding whether root 16 is rational or irrational
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Show All Working: Classifying a mixed list of numbers as rational or irrational
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Show All Working: Deciding whether two given surds are equal without a calculator
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Learn: Simplifying root 72 into its simplest form
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Learn: Why a surd is never left in the denominator
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Practice: Rationalising a denominator with a whole number multiplying the surd
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Show All Working: Checking a rationalised answer by decimal approximation
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