755 prompts matching "IGCSE Additional Maths Y11: Equating coefficients to find an unknown constant —"
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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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Worked Example: Why multiplying by the conjugate clears the surd
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Final Revision: Checking a conjugate answer by multiplying back
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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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Quiz: Checking a surd equation for extraneous roots
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Practice: Solving an equation with a surd on each side
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Explain Back: Solving an equation where the surd must be isolated first
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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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Worked Example: Reading the symbol used for a binary operation
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Quiz: Evaluating a*b from a given rule
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Practice: A binary operation set out as a table
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Explain Back: A binary operation defined on the integers
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Spot My Mistake: A binary operation defined on a set of three elements
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Common Mistakes: A binary operation that is ordinary addition in disguise
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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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Worked Example: Testing the even numbers for closure under addition
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