1,334 prompts matching "Quiz me on the using the discriminant to describe the roots"
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Explain Back: Showing that AB and BA are usually different for 2 by 2 matrices
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Spot My Mistake: Squaring a 2 by 2 matrix
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WAEC Prep: Checking a single entry of a 3 by 3 product
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Spot My Mistake: Multiplying a 3 by 3 matrix by a 3 by 1 column
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Worked Example: A singular matrix, and why it has no inverse
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WAEC Prep: Evaluating A squared minus 2A
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Practice: Evaluating AB minus BA
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WAEC Prep: Expanding a 3 by 3 determinant down a column
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Practice: Why a 2 by 2 matrix with determinant nought cannot be inverted
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WAEC Prep: A three-unknown system arising from a word problem
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WAEC Prep: Resolving before compounding several forces
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Learn: A space diagram and a force diagram drawn side by side
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WAEC Prep: A rigid body held in equilibrium by four forces
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WAEC Prep: A knot held in equilibrium by three strings
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Explain Back: A particle hanging from two strings set at different angles
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Worked Example: Finding a value from a given probability by working backwards
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WAEC Prep: Adding three complex numbers
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WAEC Prep: Multiplying a complex number by a real number
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WAEC Prep: Dividing by a purely imaginary number
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Worked Example: Squaring a complex number
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