1,334 prompts matching "Give me common mistakes students make in polynomials and the remainder/factor th"
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Quiz: Expanding a 3 by 3 determinant along a row or column containing noughts
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Worked Example: Evaluating a 3 by 3 determinant by the rule of Sarrus
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WAEC Prep: Cramer's rule applied to a pair with fractional coefficients
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WAEC Prep: Setting out the coefficient determinant for two simultaneous equations
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Worked Example: Forming the determinant Dy by replacing the second column
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WAEC Prep: The determinant Dz in a system of three unknowns
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Explain Back: What a coefficient determinant of nought says about the system
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WAEC Prep: The minor of an entry of a 3 by 3 matrix
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Explain Back: Writing out the full matrix of cofactors
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WAEC Prep: The adjoint of the identity matrix
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WAEC Prep: The order in which the cofactors are transposed
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WAEC Prep: The adjoint as the transpose of the matrix of cofactors
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Explain Back: Finding the adjoint of a 2 by 2 matrix quickly
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WAEC Prep: The inverse of a 2 by 2 matrix with a fractional determinant
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WAEC Prep: The inverse of an inverse
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Learn: Swapping and negating the entries when inverting a 2 by 2 matrix
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Quiz: Checking an inverse by multiplying to get the identity
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WAEC Prep: How long the inverse of a 3 by 3 matrix takes, and how to shorten it
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WAEC Prep: Checking the determinant before attempting a 3 by 3 inverse
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WAEC Prep: The inverse of a 3 by 3 matrix from its adjoint and its determinant
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