1,045 prompts matching "The inverse of a 3 by 3 matrix from its adjoint and its determinant"
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Common Mistakes: A word problem giving one linear and one quadratic equation
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Final Revision: Checking both solutions in both equations
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Final Revision: A word problem about a line and a parabola
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WAEC Prep: Expressions that are not polynomials, and why not
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Practice: A division that leaves no remainder
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Quiz: Which values are worth testing as factors
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Common Mistakes: Factorising fully, and knowing when to stop
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Quiz: A cubic with three distinct real roots
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Practice: A cubic with one real root and two complex ones
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Common Mistakes: Translating a symbolic statement back into English
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Practice: Negation combined with a compound statement
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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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Final Revision: A conditional statement set in an everyday situation
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Practice: What logical equivalence means
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Quiz: What a contingency is
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Practice: Showing that a statement is a tautology
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Common Mistakes: Deciding between tautology, contradiction and contingency
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Final Revision: A longer statement tested for tautology
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Quiz: Modus ponens
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