1,043 prompts matching "Expanding a 3 by 3 determinant along the first row"
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Worked Example: Factorising a cubic into a linear and a quadratic factor
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Explain Back: A polynomial with a repeated linear factor
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Common Mistakes: Factorising fully, and knowing when to stop
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Learn: Solving a cubic once it has been factorised
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Worked Example: How many roots a cubic equation has
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Quiz: A cubic with three distinct real roots
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Explain Back: A cubic with a repeated root
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Common Mistakes: A cubic equation arising from a volume problem
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Learn: What makes a sentence a proposition
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Worked Example: Sentences that are not propositions
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Common Mistakes: Translating a symbolic statement back into English
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Final Revision: A compound proposition built from three simple ones
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Worked Example: Conjunction in a three-variable truth table
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WAEC Prep: A truth table with three propositions in it
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Quiz: Why a conditional with a false antecedent counts as true
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WAEC Prep: Why a conditional and its contrapositive are equivalent
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Final Revision: A conditional statement set in an everyday situation
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Spot My Mistake: De Morgan's laws in logic
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Learn: What a tautology is
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Worked Example: What a contradiction is
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