1,334 prompts matching "Learn: What makes an expression in the roots symmetric"
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Worked Example: Taking a common factor out of a matrix
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Quiz: Multiplying a matrix by minus one
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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: A symmetric matrix, equal to its own transpose
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WAEC Prep: The identity matrix of order three
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WAEC Prep: The order of a matrix formed from a table of data
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Practice: The condition on the orders for a product to exist
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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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Spot My Mistake: Checking a Cramer's rule solution by substituting back
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WAEC Prep: The cofactor of a corner entry
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WAEC Prep: Why the cofactor signs alternate
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Quiz: Checking a 3 by 3 inverse by multiplication
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WAEC Prep: Simultaneous equations with fractional coefficients solved by matrix
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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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WAEC Prep: Mass, and how it differs from weight
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Quiz: Why mass stays the same wherever the body is taken
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