1,318 prompts matching "Solving a surd equation with terms on both sides"
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Quiz: Multiplying a matrix by minus one
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Spot My Mistake: Orders that make a product possible one way round but not the other
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Learn: Deciding whether a stated matrix calculation is possible at all
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Worked Example: What a determinant of nought means for a 2 by 2 matrix
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Explain Back: The determinant of a product as the product of the determinants
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Practice: The sign pattern of the cofactors in a 3 by 3 determinant
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Worked Example: Evaluating a 3 by 3 determinant by the rule of Sarrus
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WAEC Prep: When Cramer's rule is quicker than elimination
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WAEC Prep: What Cramer's rule gives when the system is inconsistent
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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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Practice: Turning a minor into a cofactor with the sign 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: How long the inverse of a 3 by 3 matrix takes, and how to shorten it
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Quiz: Checking a 3 by 3 inverse by multiplication
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WAEC Prep: Reading the solution off the product of the inverse and the constants
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WAEC Prep: The newton, and how it is defined
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Learn: Converting a weight given in kilogram-force into newtons
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Spot My Mistake: Compounding three forces acting at one point
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WAEC Prep: The angle the resultant makes with the larger of two forces
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