1,334 prompts matching "Quiz me on the sum and product of the roots of a cubic"
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Worked Example: Evaluating a 3 by 3 determinant by the rule of Sarrus
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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 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 allExplain Back: What a coefficient determinant of nought says about the system
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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 allExplain Back: Writing out the full matrix of cofactors
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Subscribe to unlock allExplain Back: Finding the adjoint of a 2 by 2 matrix quickly
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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 allSpot My Mistake: Why the inverse must be applied on the correct side
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Subscribe to unlock allPractice: What a singular coefficient matrix says about the equations
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Subscribe to unlock allWAEC Prep: When the matrix method is worth the work for three unknowns
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Subscribe to unlock allLearn: Inertia, and what mass actually measures
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Subscribe to unlock allWAEC Prep: The difference between a kilogram and a kilogram weight
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Subscribe to unlock allWAEC Prep: Why one component vanishes when the direction is chosen well
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Subscribe to unlock allWAEC Prep: Resolving a force into horizontal and vertical components
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Subscribe to unlock allExplain Back: Showing that a system of concurrent forces is in equilibrium
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Subscribe to unlock allWAEC Prep: The forces on a body resting on a rough horizontal plane
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