1,251 prompts matching "Common surd mistakes to watch out for"
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WAEC Prep: Adding two 2 by 2 matrices entry by entry
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Worked Example: Adding two 3 by 3 matrices
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WAEC Prep: Subtracting one 2 by 2 matrix from another
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WAEC Prep: Multiplying every entry of a matrix by a scalar
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WAEC Prep: The difference between pre-multiplying and post-multiplying by a matrix
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WAEC Prep: The identity matrix, and what it does in a product
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Worked Example: A singular matrix, and why it has no inverse
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WAEC Prep: Reading the order of a matrix as rows by columns
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WAEC Prep: The determinant of a 2 by 2 matrix as ad minus bc
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WAEC Prep: Expanding a 3 by 3 determinant along the first row
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Worked Example: Evaluating a 3 by 3 determinant by the rule of Sarrus
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WAEC Prep: The minor of an entry of a 3 by 3 matrix
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Worked Example: The identity that A times its adjoint gives the determinant times the identity
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WAEC Prep: The inverse of a 2 by 2 matrix as one over the determinant times the adjoint
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WAEC Prep: The inverse of a 3 by 3 matrix from its adjoint and its determinant
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WAEC Prep: Writing two simultaneous equations as a single matrix equation
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WAEC Prep: Writing three simultaneous equations as a single matrix equation
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Worked Example: Checking the solution of three equations by substitution
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WAEC Prep: Mass, and how it differs from weight
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Worked Example: The units of mass, and the SI unit
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