755 prompts matching "The imaginary unit i, and why i squared is minus one"
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Quiz: Writing a recurring decimal as a fraction to show it is rational
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Show All Working: Classifying a mixed list of numbers as rational or irrational
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WAEC Prep: Ordering a list of surds by size
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Show All Working: Deciding whether two given surds are equal without a calculator
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Common Mistakes: Expressing root 50 as a multiple of root 2
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WAEC Prep: Rationalising a denominator inside a larger expression
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Show All Working: Checking a rationalised answer by decimal approximation
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Learn: The conjugate of a compound surd expression
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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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Show All Working: Finding a and b when a plus b root 2 equals a given surd
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Common Mistakes: A surd equation that has no real solution
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Learn: What a binary operation actually is
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Common Mistakes: A binary operation that is ordinary addition in disguise
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WAEC Prep: A set closed under one operation but not another
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Show All Working: Showing a set is not closed by a single counter-example
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Common Mistakes: Closure on a set of three elements under a stated rule
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Practice: An operation that is not commutative, with a counter-example
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WAEC Prep: An operation that is commutative but not associative
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Show All Working: An operation that is associative but not commutative
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