755 prompts matching "Spot my mistake in a Cramer's rule solution"
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Length of a line segment on a graph
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Coordinate geometry proof: isosceles triangle
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Coordinate geometry exam question: quadrilateral vertices
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Distinguishing gradient sign: positive, negative, zero, undefined
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Factorising by taking out a common factor
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Changing the subject of a simple formula
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Cross-multiplying to solve an equation with fractions
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Common sign errors in algebraic manipulation
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Common Mistakes: Why a rational number added to an irrational one stays irrational
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Final Revision: Approximating a surd to three decimal places
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Final Revision: Surds that cannot be combined at all
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Final Revision: Simplifying a fraction whose numerator and denominator are both surds
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Final Revision: Expressing a rationalised answer in the form a root b over c
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Final Revision: Checking a conjugate answer by multiplying back
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Final Revision: A word problem that leads to an equation in surd form
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Final Revision: Why closure is checked before any other property
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Common Mistakes: Subtraction as an example of neither law
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Final Revision: Why brackets matter when an operation is not associative
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WAEC Prep: A rule where distributivity holds one way only
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Common Mistakes: Distributivity on a set of three elements
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