587 prompts matching "Subtracting one 2 by 2 matrix from another"
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Coordinate geometry applied to a triangle's area check
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Factorising the difference of two squares
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Multiplying two algebraic fractions
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Solving a linear inequality and showing the solution
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Solving a double inequality
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Changing the subject of a simple formula
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Changing the subject with a square or square root
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Solving a word problem using simultaneous equations
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Cross-multiplying to solve an equation with fractions
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Explaining the difference between an expression and an equation
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Common sign errors in algebraic manipulation
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Worked Example: Why the square root of a non-square whole number is irrational
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Practice: Deciding whether root 16 is rational or irrational
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Explain Back: Where the surds sit on the number line
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Spot My Mistake: The decimal expansion of an irrational number, and why it never repeats
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Show All Working: Classifying a mixed list of numbers as rational or irrational
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Final Revision: Approximating a surd to three decimal places
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Worked Example: What makes two surds equal
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Practice: Collecting similar surds in an expression
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Explain Back: Why 2 root 3 and 5 root 3 count as similar surds
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