1,320 prompts matching "Expanding the product of two surd brackets"
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WAEC Prep: Subtracting one 2 by 2 matrix from another
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WAEC Prep: Raising a 2 by 2 matrix to the third power
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WAEC Prep: Multiplying a 3 by 3 matrix by the identity matrix
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WAEC Prep: The difference between pre-multiplying and post-multiplying by a matrix
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Quiz: The zero matrix, and how it differs from nought in arithmetic
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Learn: Deciding whether a stated matrix calculation is possible at all
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Spot My Mistake: Forming the determinant Dx by replacing the first column
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Worked Example: Forming the determinant Dy by replacing the second column
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WAEC Prep: What Cramer's rule gives when the system is inconsistent
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Quiz: Arranging the equations in standard form before applying Cramer's rule
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Worked Example: The identity that A times its adjoint gives the determinant times the identity
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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: Checking the determinant before attempting a 3 by 3 inverse
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Spot My Mistake: Why the inverse must be applied on the correct side
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Practice: What a singular coefficient matrix says about the equations
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WAEC Prep: When the matrix method is worth the work for three unknowns
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Quiz: Solving three simultaneous equations with the inverse matrix
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Practice: Comparing the inverse method with elimination for three equations
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WAEC Prep: A particle, and what the word assumes
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