674 prompts matching "Cramer's rule applied to a pair with fractional coefficients"
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WAEC-style past question on algebraic fractions
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Common sign errors in algebraic manipulation
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Learn: Telling a rational number from an irrational one
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Spot My Mistake: The decimal expansion of an irrational number, and why it never repeats
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Learn: What makes two surds similar
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Quiz: Subtracting one surd from another
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Spot My Mistake: Dividing one surd by another
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Learn: The conjugate of a compound surd expression
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Quiz: Checking a surd equation for extraneous roots
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Learn: What a binary operation actually is
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Spot My Mistake: A binary operation defined on a set of three elements
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Learn: What closure means for a binary operation
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Quiz: Testing the odd numbers for closure under addition
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Spot My Mistake: Reading closure off an operation table
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Quiz: Reading commutativity off a symmetrical operation table
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Spot My Mistake: Testing (a*b)*c against a*(b*c)
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Quiz: Left distributivity and right distributivity
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Spot My Mistake: Checking distributivity from two operation tables
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Learn: What an identity element is
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Quiz: Finding the identity element from an operation table
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