755 prompts matching "Dividing one complex number by another using the conjugate"
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Worked Example: Adding two surds that simplify to the same root
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Learn: Why a surd is never left in the denominator
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Explain Back: Simplifying the answer once the denominator is rational
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Spot My Mistake: Rationalising and then cancelling a common factor
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Show All Working: Checking a rationalised answer by decimal approximation
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Final Revision: Expressing a rationalised answer in the form a root b over c
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Learn: The conjugate of a compound surd expression
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Explain Back: The difference of two squares applied to surd conjugates
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Spot My Mistake: Simplifying the denominator once the conjugate has been used
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Show All Working: A conjugate where the surd term comes first
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Explain Back: Solving an equation where the surd must be isolated first
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Worked Example: Reading the symbol used for a binary operation
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Explain Back: A binary operation defined on the integers
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Final Revision: Deciding whether a given rule really is 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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Final Revision: Why closure is checked before any other property
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Worked Example: Testing whether star distributes over plus
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WAEC Prep: A rule where distributivity holds one way only
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Worked Example: Finding the identity element from a rule such as a*b = a + b - 3
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