1,334 prompts matching "Subtraction as an example of neither law"
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Quiz: Multiplying a matrix by minus one
Act as my SS3 Further Mathematics tutor and quiz me on multiplying a matrix by minus one.
WAEC Prep: Pre-multiplying a column vector by a matrix
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WAEC Prep: Post-multiplying a row vector by a matrix
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Spot My Mistake: Orders that make a product possible one way round but not the other
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WAEC Prep: A skew-symmetric matrix
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Practice: A diagonal matrix
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Practice: The condition on the orders for a product to exist
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Learn: Deciding whether a stated matrix calculation is possible at all
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WAEC Prep: Evaluating A squared minus 2A
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WAEC Prep: Evaluating 2A plus 3B for two given matrices
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Practice: Evaluating AB minus BA
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WAEC Prep: Cramer's rule applied to a pair with fractional coefficients
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WAEC Prep: What Cramer's rule gives when the system is inconsistent
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Spot My Mistake: Checking a Cramer's rule solution by substituting back
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Quiz: Checking a 3 by 3 inverse by multiplication
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Spot My Mistake: Why the inverse must be applied on the correct side
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Practice: What a singular coefficient matrix says about the equations
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WAEC Prep: A three-unknown system arising from a word problem
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WAEC Prep: When the matrix method is worth the work for three unknowns
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Practice: Comparing the inverse method with elimination for three equations
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