310 prompts matching "Squaring both sides safely when solving a surd equation"
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Quiz: Factorising a polynomial by grouping terms
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Spot My Mistake: Factorising the sum of two cubes
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Quiz: A cubic with three distinct real roots
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Spot My Mistake: Finding the remaining roots once one is known
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Quiz: The truth value of a simple proposition
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Spot My Mistake: The negation of a proposition
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Quiz: Disjunction and the inclusive or
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Spot My Mistake: Building a truth table column by column
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Quiz: Why a conditional with a false antecedent counts as true
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Spot My Mistake: The contrapositive of a conditional
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Quiz: The biconditional as two conditionals taken together
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Spot My Mistake: De Morgan's laws in logic
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Quiz: What a contingency is
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Spot My Mistake: The law of the excluded middle
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Quiz: Modus ponens
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Spot My Mistake: Disjunctive syllogism
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Quiz: Arrangements of a word with no repeated letters
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Spot My Mistake: Arrangements with two particular items adjacent
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Quiz: Why one person is fixed in a circular arrangement
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Spot My Mistake: Arrangements round a table with men and women alternating
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