755 prompts matching "Learn: Swapping and negating the entries when inverting a 2 by 2 matrix"
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Practice: Deciding whether root 16 is rational or irrational
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Learn: What makes two surds similar
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Explain Back: Why 2 root 3 and 5 root 3 count as similar surds
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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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Final Revision: Simplifying a fraction whose numerator and denominator are both surds
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Practice: Rationalising a denominator with a whole number multiplying the surd
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Common Mistakes: Rationalising a denominator of the form root a over root b
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Final Revision: Expressing a rationalised answer in the form a root b over c
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Practice: Rationalising a denominator of the form a plus root b over c minus root d
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WAEC Prep: Expressing the answer in the form a plus b root c
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Show All Working: A conjugate where the surd term comes first
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Learn: Solving an equation with a single square root term
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Worked Example: Squaring both sides safely when solving a surd equation
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Learn: What a binary operation actually is
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Final Revision: Deciding whether a given rule really is a binary operation
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Learn: What closure means for a binary operation
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WAEC Prep: A set closed under one operation but not another
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Final Revision: Why closure is checked before any other property
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Learn: What it means for an operation to be commutative
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