755 prompts matching "The distance between two points from their position vectors"
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Rationalising the denominator when it's a surd minus a surd
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Surd equation from a geometry context
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Union and intersection of two number sets
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Finding a missing intersection from set sizes
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Number of elements in a set from a Venn diagram region count
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Deriving the arithmetic series sum formula
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Gradient from a linear equation
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Equation of a line given gradient and one point
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Simultaneous equations of a line and the coordinate axes
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Finding an unknown coordinate using the gradient formula
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Equation of a line with a given y-intercept and passing through a point
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Finding the equation of a median of a triangle
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Expanding a product of two brackets
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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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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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Worked Example: What makes two surds equal
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Learn: Why a surd is never left in the denominator
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