1,305 prompts matching "Solving a surd equation that gives an extraneous root"
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WAEC Prep: Multiplying every entry of a matrix by a scalar
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Worked Example: Taking a common factor out of a matrix
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Learn: The distributive law for a scalar over a sum of matrices
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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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WAEC Prep: A skew-symmetric matrix
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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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WAEC Prep: Stating the order of a product before working it out
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WAEC Prep: Reading the order of a matrix as rows by columns
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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: Cramer's rule applied to a pair with fractional coefficients
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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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WAEC Prep: The adjoint of the identity matrix
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Spot My Mistake: Finding the adjoint of a 3 by 3 matrix
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Learn: The order of the steps in inverting a 3 by 3 matrix
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