1,045 prompts matching "The identity matrix, and what it does in a product"
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Final Revision: A word problem solved with the quadratic formula
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WAEC Prep: Checking the sum and product against the solved roots
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Common Mistakes: A symmetric function needing the sum and product twice over
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Quiz: Solving the quadratic that results from the substitution
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Explain Back: Writing the answers as ordered pairs
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Quiz: The condition for two points of intersection
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Practice: The condition for the line to be a tangent
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Explain Back: The condition for the line never to meet the curve
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Quiz: The leading term and the constant term
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Common Mistakes: The degree of the quotient and of the remainder
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Final Revision: Writing the result of a polynomial division out in full
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Show All Working: What the factor theorem says about the roots
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Final Revision: Checking a factorisation by expanding it again
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Explain Back: The disjunction of two propositions
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Quiz: Disjunction and the inclusive or
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Explain Back: The truth table for a statement with two connectives
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Explain Back: The inverse of a conditional
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Show All Working: Why a conditional and its converse are not equivalent
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Final Revision: A biconditional used in a mathematical definition
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Final Revision: An argument written in words and tested for validity
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