1,334 prompts matching "Give me a 5-minute recap of the quadratic formula"
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WAEC Prep: Subtracting one 2 by 2 matrix from another
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Subscribe to unlock allWAEC Prep: Raising a 2 by 2 matrix to the third power
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Subscribe to unlock allWAEC Prep: Multiplying a 3 by 3 matrix by the identity matrix
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Subscribe to unlock allWAEC Prep: The difference between pre-multiplying and post-multiplying by a matrix
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Subscribe to unlock allSpot My Mistake: Orders that make a product possible one way round but not the other
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Subscribe to unlock allSpot My Mistake: A symmetric matrix, equal to its own transpose
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Subscribe to unlock allWAEC Prep: A skew-symmetric matrix
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Subscribe to unlock allWAEC Prep: The identity matrix, and what it does in a product
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Subscribe to unlock allLearn: Deciding whether a stated matrix calculation is possible at all
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Subscribe to unlock allWAEC Prep: Expanding a 3 by 3 determinant along the first row
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Subscribe to unlock allWAEC Prep: When Cramer's rule is quicker than elimination
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Subscribe to unlock allWAEC Prep: Cramer's rule applied to a pair with fractional coefficients
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Subscribe to unlock allWAEC Prep: Setting out the coefficient determinant for two simultaneous equations
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Subscribe to unlock allSpot My Mistake: Forming the determinant Dx by replacing the first column
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Subscribe to unlock allWorked Example: Forming the determinant Dy by replacing the second column
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Subscribe to unlock allLearn: Solving two simultaneous equations by Cramer's rule
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Subscribe to unlock allWAEC Prep: Setting out Cramer's rule for three simultaneous equations
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Subscribe to unlock allSpot My Mistake: Checking a Cramer's rule solution by substituting back
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Subscribe to unlock allLearn: Swapping and negating the entries when inverting a 2 by 2 matrix
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Subscribe to unlock allQuiz: Checking an inverse by multiplying to get the identity
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