722 prompts matching "Checking a completed square by expanding it again"
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Practice: An operation that is not commutative, with a counter-example
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Explain Back: What it means for an operation to be associative
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Common Mistakes: Subtraction as an example of neither law
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Learn: What it means for one operation to distribute over another
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Quiz: Left distributivity and right distributivity
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Practice: Multiplication distributing over addition in ordinary arithmetic
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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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Final Revision: Why distributivity links two operations rather than one
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Learn: What an identity element is
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Worked Example: Finding the identity element from a rule such as a*b = a + b - 3
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Quiz: Finding the identity element from an operation table
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Practice: Why an identity element must work from both sides
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WAEC Prep: The inverse of the identity element itself
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Final Revision: Identity and inverse together, and what they give the set
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Worked Example: Rewriting a negative index as a fraction
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Quiz: A negative index on a fraction, and turning it upside down
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Practice: A fractional index with numerator one, read as a root
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Explain Back: A fractional index with a numerator above one
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Common Mistakes: Writing a root as a fractional index before simplifying
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