1,329 prompts matching "Learn: Making the coefficient of x squared equal to one first"
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WAEC Prep: Multiplying two 3 by 3 matrices, row into column
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WAEC Prep: Multiplying every entry of a matrix by a scalar
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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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Quiz: The zero matrix, and how it differs from nought in arithmetic
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WAEC Prep: A matrix expression with brackets to expand
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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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Learn: Solving two simultaneous equations by Cramer's rule
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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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WAEC Prep: Checking the determinant before attempting a 3 by 3 inverse
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Explain Back: Solving two simultaneous equations by multiplying by the inverse
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Spot My Mistake: Why the inverse must be applied on the correct side
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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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