573 prompts matching "Practice: Why complex roots of a real quadratic come in conjugate pairs"
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Explain Back: Solving an equation where the surd must be isolated first
I have just studied solving an equation where the surd must be isolated first in my SS1 Fu
Final Revision: A word problem that leads to an equation in surd form
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Learn: What a binary operation actually is
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Explain Back: A binary operation defined on the integers
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Show All Working: Evaluating a repeated operation such as a*(b*c)
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Common Mistakes: A binary operation that is ordinary addition in disguise
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Learn: What closure means for a binary operation
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Explain Back: Testing the integers for closure under division
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Show All Working: Showing a set is not closed by a single counter-example
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Learn: What it means for an operation to be commutative
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Explain Back: What it means for an operation to be associative
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Show All Working: An operation that is associative but not commutative
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Learn: What it means for one operation to distribute over another
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Explain Back: Showing distributivity fails by a counter-example
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Show All Working: Using distributivity to simplify an expression
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Learn: What an identity element is
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Explain Back: What an inverse element is
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Show All Working: An element with no inverse under a given operation
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Common Mistakes: Checking an inverse by working the operation both ways
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Final Revision: Identity and inverse together, and what they give the set
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