1,251 prompts matching "Common surd mistakes to watch out for"
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Worked Example: The associative law for the product of three matrices
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Learn: The distributive law for a scalar over a sum of matrices
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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: Orders that make a product possible one way round but not the other
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WAEC Prep: The transpose of a column vector
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WAEC Prep: Writing the transpose of a matrix by turning rows into columns
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WAEC Prep: A matrix expression with brackets to expand
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WAEC Prep: Evaluating 2A plus 3B for two given matrices
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Worked Example: What a determinant of nought means for a 2 by 2 matrix
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Practice: The sign pattern of the cofactors in a 3 by 3 determinant
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WAEC Prep: Cramer's rule applied to a pair with fractional coefficients
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Worked Example: Forming the determinant Dy by replacing the second column
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Explain Back: What a coefficient determinant of nought says about the system
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Spot My Mistake: Checking a Cramer's rule solution by substituting back
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Quiz: Arranging the equations in standard form before applying Cramer's rule
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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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Practice: Turning a minor into a cofactor with the sign rule
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WAEC Prep: The order in which the cofactors are transposed
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